public final class Character extends Objectimplements Serializable , Comparable <Character >
Character
class wraps a value of the primitive type
char
in an object. An object of type
Character
contains a single field whose type is
char
.
In addition, this class provides several methods for determining a character's category (lowercase letter, digit, etc.) and for converting characters from uppercase to lowercase and vice versa.
Character information is based on the Unicode Standard, version 6.2.0.
The methods and data of class Character
are defined by the information in the UnicodeData file that is part of the Unicode Character Database maintained by the Unicode Consortium. This file specifies various properties including name and general category for every defined Unicode code point or character range.
The file and its description are available from the Unicode Consortium at:
The char
data type (and therefore the value that a Character
object encapsulates) are based on the original Unicode specification, which defined characters as fixed-width 16-bit entities. The Unicode Standard has since been changed to allow for characters whose representation requires more than 16 bits. The range of legal code points is now U+0000 to U+10FFFF, known as Unicode scalar value. (Refer to the definition of the U+n notation in the Unicode Standard.)
The set of characters from U+0000 to U+FFFF is sometimes referred to as the Basic Multilingual Plane (BMP). Characters whose code points are greater than U+FFFF are called supplementary characters. The Java platform uses the UTF-16 representation in char
arrays and in the String
and StringBuffer
classes. In this representation, supplementary characters are represented as a pair of char
values, the first from the high-surrogates range, (\uD800-\uDBFF), the second from the low-surrogates range (\uDC00-\uDFFF).
A char
value, therefore, represents Basic Multilingual Plane (BMP) code points, including the surrogate code points, or code units of the UTF-16 encoding. An int
value represents all Unicode code points, including supplementary code points. The lower (least significant) 21 bits of int
are used to represent Unicode code points and the upper (most significant) 11 bits must be zero. Unless otherwise specified, the behavior with respect to supplementary characters and surrogate char
values is as follows:
char
value cannot support supplementary characters. They treat char
values from the surrogate ranges as undefined characters. For example, Character.isLetter('\uD840')
returns false
, even though this specific value if followed by any low-surrogate value in a string would represent a letter. int
value support all Unicode characters, including supplementary characters. For example, Character.isLetter(0x2F81A)
returns true
because the code point value represents a letter (a CJK ideograph). In the Java SE API documentation, Unicode code point is used for character values in the range between U+0000 and U+10FFFF, and Unicode code unit is used for 16-bit char
values that are code units of the UTF-16 encoding. For more information on Unicode terminology, refer to the Unicode Glossary.
Modifier and Type | Class and Description |
---|---|
static class |
Character
Instances of this class represent particular subsets of the Unicode character set.
|
static class |
Character
A family of character subsets representing the character blocks in the Unicode specification.
|
static class |
Character
A family of character subsets representing the character scripts defined in the
Unicode Standard Annex #24: Script Names.
|
Modifier and Type | Field and Description |
---|---|
static int |
BYTES
The number of bytes used to represent a
char value in unsigned binary form.
|
static byte |
COMBINING_SPACING_MARK
General category "Mc" in the Unicode specification.
|
static byte |
CONNECTOR_PUNCTUATION
General category "Pc" in the Unicode specification.
|
static byte |
CONTROL
General category "Cc" in the Unicode specification.
|
static byte |
CURRENCY_SYMBOL
General category "Sc" in the Unicode specification.
|
static byte |
DASH_PUNCTUATION
General category "Pd" in the Unicode specification.
|
static byte |
DECIMAL_DIGIT_NUMBER
General category "Nd" in the Unicode specification.
|
static byte |
DIRECTIONALITY_ARABIC_NUMBER
Weak bidirectional character type "AN" in the Unicode specification.
|
static byte |
DIRECTIONALITY_BOUNDARY_NEUTRAL
Weak bidirectional character type "BN" in the Unicode specification.
|
static byte |
DIRECTIONALITY_COMMON_NUMBER_SEPARATOR
Weak bidirectional character type "CS" in the Unicode specification.
|
static byte |
DIRECTIONALITY_EUROPEAN_NUMBER
Weak bidirectional character type "EN" in the Unicode specification.
|
static byte |
DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR
Weak bidirectional character type "ES" in the Unicode specification.
|
static byte |
DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR
Weak bidirectional character type "ET" in the Unicode specification.
|
static byte |
DIRECTIONALITY_LEFT_TO_RIGHT
Strong bidirectional character type "L" in the Unicode specification.
|
static byte |
DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING
Strong bidirectional character type "LRE" in the Unicode specification.
|
static byte |
DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE
Strong bidirectional character type "LRO" in the Unicode specification.
|
static byte |
DIRECTIONALITY_NONSPACING_MARK
Weak bidirectional character type "NSM" in the Unicode specification.
|
static byte |
DIRECTIONALITY_OTHER_NEUTRALS
Neutral bidirectional character type "ON" in the Unicode specification.
|
static byte |
DIRECTIONALITY_PARAGRAPH_SEPARATOR
Neutral bidirectional character type "B" in the Unicode specification.
|
static byte |
DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
Weak bidirectional character type "PDF" in the Unicode specification.
|
static byte |
DIRECTIONALITY_RIGHT_TO_LEFT
Strong bidirectional character type "R" in the Unicode specification.
|
static byte |
DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC
Strong bidirectional character type "AL" in the Unicode specification.
|
static byte |
DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING
Strong bidirectional character type "RLE" in the Unicode specification.
|
static byte |
DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE
Strong bidirectional character type "RLO" in the Unicode specification.
|
static byte |
DIRECTIONALITY_SEGMENT_SEPARATOR
Neutral bidirectional character type "S" in the Unicode specification.
|
static byte |
DIRECTIONALITY_UNDEFINED
Undefined bidirectional character type.
|
static byte |
DIRECTIONALITY_WHITESPACE
Neutral bidirectional character type "WS" in the Unicode specification.
|
static byte |
ENCLOSING_MARK
General category "Me" in the Unicode specification.
|
static byte |
END_PUNCTUATION
General category "Pe" in the Unicode specification.
|
static byte |
FINAL_QUOTE_PUNCTUATION
General category "Pf" in the Unicode specification.
|
static byte |
FORMAT
General category "Cf" in the Unicode specification.
|
static byte |
INITIAL_QUOTE_PUNCTUATION
General category "Pi" in the Unicode specification.
|
static byte |
LETTER_NUMBER
General category "Nl" in the Unicode specification.
|
static byte |
LINE_SEPARATOR
General category "Zl" in the Unicode specification.
|
static byte |
LOWERCASE_LETTER
General category "Ll" in the Unicode specification.
|
static byte |
MATH_SYMBOL
General category "Sm" in the Unicode specification.
|
static int |
MAX_CODE_POINT
The maximum value of a
Unicode code point, constant
U+10FFFF .
|
static char |
MAX_HIGH_SURROGATE
The maximum value of a
Unicode high-surrogate code unit in the UTF-16 encoding, constant
'\uDBFF' .
|
static char |
MAX_LOW_SURROGATE
The maximum value of a
Unicode low-surrogate code unit in the UTF-16 encoding, constant
'\uDFFF' .
|
static int |
MAX_RADIX
The maximum radix available for conversion to and from strings.
|
static char |
MAX_SURROGATE
The maximum value of a Unicode surrogate code unit in the UTF-16 encoding, constant
'\uDFFF' .
|
static char |
MAX_VALUE
The constant value of this field is the largest value of type
char ,
'\uFFFF' .
|
static int |
MIN_CODE_POINT
The minimum value of a
Unicode code point, constant
U+0000 .
|
static char |
MIN_HIGH_SURROGATE
The minimum value of a
Unicode high-surrogate code unit in the UTF-16 encoding, constant
'\uD800' .
|
static char |
MIN_LOW_SURROGATE
The minimum value of a
Unicode low-surrogate code unit in the UTF-16 encoding, constant
'\uDC00' .
|
static int |
MIN_RADIX
The minimum radix available for conversion to and from strings.
|
static int |
MIN_SUPPLEMENTARY_CODE_POINT
The minimum value of a
Unicode supplementary code point, constant
U+10000 .
|
static char |
MIN_SURROGATE
The minimum value of a Unicode surrogate code unit in the UTF-16 encoding, constant
'\uD800' .
|
static char |
MIN_VALUE
The constant value of this field is the smallest value of type
char ,
'\u0000' .
|
static byte |
MODIFIER_LETTER
General category "Lm" in the Unicode specification.
|
static byte |
MODIFIER_SYMBOL
General category "Sk" in the Unicode specification.
|
static byte |
NON_SPACING_MARK
General category "Mn" in the Unicode specification.
|
static byte |
OTHER_LETTER
General category "Lo" in the Unicode specification.
|
static byte |
OTHER_NUMBER
General category "No" in the Unicode specification.
|
static byte |
OTHER_PUNCTUATION
General category "Po" in the Unicode specification.
|
static byte |
OTHER_SYMBOL
General category "So" in the Unicode specification.
|
static byte |
PARAGRAPH_SEPARATOR
General category "Zp" in the Unicode specification.
|
static byte |
PRIVATE_USE
General category "Co" in the Unicode specification.
|
static int |
SIZE
The number of bits used to represent a
char value in unsigned binary form, constant
16 .
|
static byte |
SPACE_SEPARATOR
General category "Zs" in the Unicode specification.
|
static byte |
START_PUNCTUATION
General category "Ps" in the Unicode specification.
|
static byte |
SURROGATE
General category "Cs" in the Unicode specification.
|
static byte |
TITLECASE_LETTER
General category "Lt" in the Unicode specification.
|
static Class |
TYPE
The
Class instance representing the primitive type
char .
|
static byte |
UNASSIGNED
General category "Cn" in the Unicode specification.
|
static byte |
UPPERCASE_LETTER
General category "Lu" in the Unicode specification.
|
Constructor and Description |
---|
Character(char value)
Constructs a newly allocated
Character object that represents the specified
char value.
|
Modifier and Type | Method and Description |
---|---|
static int |
charCount(int codePoint)
Determines the number of
char values needed to represent the specified character (Unicode code point).
|
char |
charValue()
Returns the value of this
Character object.
|
static int |
codePointAt(char[] a, int index)
Returns the code point at the given index of the
char array.
|
static int |
codePointAt(char[] a, int index, int limit)
Returns the code point at the given index of the
char array, where only array elements with
index less than
limit can be used.
|
static int |
codePointAt(CharSequence
Returns the code point at the given index of the
CharSequence .
|
static int |
codePointBefore(char[] a, int index)
Returns the code point preceding the given index of the
char array.
|
static int |
codePointBefore(char[] a, int index, int start)
Returns the code point preceding the given index of the
char array, where only array elements with
index greater than or equal to
start can be used.
|
static int |
codePointBefore(CharSequence
Returns the code point preceding the given index of the
CharSequence .
|
static int |
codePointCount(char[] a, int offset, int count)
Returns the number of Unicode code points in a subarray of the
char array argument.
|
static int |
codePointCount(CharSequence
Returns the number of Unicode code points in the text range of the specified char sequence.
|
static int |
compare(char x, char y)
Compares two
char values numerically.
|
int |
compareTo(Character
Compares two
Character objects numerically.
|
static int |
digit(char ch, int radix)
Returns the numeric value of the character
ch in the specified radix.
|
static int |
digit(int codePoint, int radix)
Returns the numeric value of the specified character (Unicode code point) in the specified radix.
|
boolean |
equals(Object
Compares this object against the specified object.
|
static char |
forDigit(int digit, int radix)
Determines the character representation for a specific digit in the specified radix.
|
static byte |
getDirectionality(char ch)
Returns the Unicode directionality property for the given character.
|
static byte |
getDirectionality(int codePoint)
Returns the Unicode directionality property for the given character (Unicode code point).
|
static String |
getName(int codePoint)
Returns the Unicode name of the specified character
codePoint , or null if the code point is
unassigned .
|
static int |
getNumericValue(char ch)
Returns the
int value that the specified Unicode character represents.
|
static int |
getNumericValue(int codePoint)
Returns the
int value that the specified character (Unicode code point) represents.
|
static int |
getType(char ch)
Returns a value indicating a character's general category.
|
static int |
getType(int codePoint)
Returns a value indicating a character's general category.
|
int |
hashCode()
Returns a hash code for this
Character ; equal to the result of invoking
charValue() .
|
static int |
hashCode(char value)
Returns a hash code for a
char value; compatible with
Character.hashCode() .
|
static char |
highSurrogate(int codePoint)
Returns the leading surrogate (a
high surrogate code unit) of the
surrogate pair representing the specified supplementary character (Unicode code point) in the UTF-16 encoding.
|
static boolean |
isAlphabetic(int codePoint)
Determines if the specified character (Unicode code point) is an alphabet.
|
static boolean |
isBmpCodePoint(int codePoint)
Determines whether the specified character (Unicode code point) is in the
Basic Multilingual Plane (BMP).
|
static boolean |
isDefined(char ch)
Determines if a character is defined in Unicode.
|
static boolean |
isDefined(int codePoint)
Determines if a character (Unicode code point) is defined in Unicode.
|
static boolean |
isDigit(char ch)
Determines if the specified character is a digit.
|
static boolean |
isDigit(int codePoint)
Determines if the specified character (Unicode code point) is a digit.
|
static boolean |
isHighSurrogate(char ch)
Determines if the given
char value is a
Unicode high-surrogate code unit (also known as
leading-surrogate code unit).
|
static boolean |
isIdentifierIgnorable(char ch)
Determines if the specified character should be regarded as an ignorable character in a Java identifier or a Unicode identifier.
|
static boolean |
isIdentifierIgnorable(int codePoint)
Determines if the specified character (Unicode code point) should be regarded as an ignorable character in a Java identifier or a Unicode identifier.
|
static boolean |
isIdeographic(int codePoint)
Determines if the specified character (Unicode code point) is a CJKV (Chinese, Japanese, Korean and Vietnamese) ideograph, as defined by the Unicode Standard.
|
static boolean |
isISOControl(char ch)
Determines if the specified character is an ISO control character.
|
static boolean |
isISOControl(int codePoint)
Determines if the referenced character (Unicode code point) is an ISO control character.
|
static boolean |
isJavaIdentifierPart(char ch)
Determines if the specified character may be part of a Java identifier as other than the first character.
|
static boolean |
isJavaIdentifierPart(int codePoint)
Determines if the character (Unicode code point) may be part of a Java identifier as other than the first character.
|
static boolean |
isJavaIdentifierStart(char ch)
Determines if the specified character is permissible as the first character in a Java identifier.
|
static boolean |
isJavaIdentifierStart(int codePoint)
Determines if the character (Unicode code point) is permissible as the first character in a Java identifier.
|
static boolean |
isJavaLetter(char ch)
Deprecated.
Replaced by isJavaIdentifierStart(char).
|
static boolean |
isJavaLetterOrDigit(char ch)
Deprecated.
Replaced by isJavaIdentifierPart(char).
|
static boolean |
isLetter(char ch)
Determines if the specified character is a letter.
|
static boolean |
isLetter(int codePoint)
Determines if the specified character (Unicode code point) is a letter.
|
static boolean |
isLetterOrDigit(char ch)
Determines if the specified character is a letter or digit.
|
static boolean |
isLetterOrDigit(int codePoint)
Determines if the specified character (Unicode code point) is a letter or digit.
|
static boolean |
isLowerCase(char ch)
Determines if the specified character is a lowercase character.
|
static boolean |
isLowerCase(int codePoint)
Determines if the specified character (Unicode code point) is a lowercase character.
|
static boolean |
isLowSurrogate(char ch)
Determines if the given
char value is a
Unicode low-surrogate code unit (also known as
trailing-surrogate code unit).
|
static boolean |
isMirrored(char ch)
Determines whether the character is mirrored according to the Unicode specification.
|
static boolean |
isMirrored(int codePoint)
Determines whether the specified character (Unicode code point) is mirrored according to the Unicode specification.
|
static boolean |
isSpace(char ch)
Deprecated.
Replaced by isWhitespace(char).
|
static boolean |
isSpaceChar(char ch)
Determines if the specified character is a Unicode space character.
|
static boolean |
isSpaceChar(int codePoint)
Determines if the specified character (Unicode code point) is a Unicode space character.
|
static boolean |
isSupplementaryCodePoint(int codePoint)
Determines whether the specified character (Unicode code point) is in the
supplementary character range.
|
static boolean |
isSurrogate(char ch)
Determines if the given
char value is a Unicode
surrogate code unit.
|
static boolean |
isSurrogatePair(char high, char low)
Determines whether the specified pair of
char values is a valid
Unicode surrogate pair.
|
static boolean |
isTitleCase(char ch)
Determines if the specified character is a titlecase character.
|
static boolean |
isTitleCase(int codePoint)
Determines if the specified character (Unicode code point) is a titlecase character.
|
static boolean |
isUnicodeIdentifierPart(char ch)
Determines if the specified character may be part of a Unicode identifier as other than the first character.
|
static boolean |
isUnicodeIdentifierPart(int codePoint)
Determines if the specified character (Unicode code point) may be part of a Unicode identifier as other than the first character.
|
static boolean |
isUnicodeIdentifierStart(char ch)
Determines if the specified character is permissible as the first character in a Unicode identifier.
|
static boolean |
isUnicodeIdentifierStart(int codePoint)
Determines if the specified character (Unicode code point) is permissible as the first character in a Unicode identifier.
|
static boolean |
isUpperCase(char ch)
Determines if the specified character is an uppercase character.
|
static boolean |
isUpperCase(int codePoint)
Determines if the specified character (Unicode code point) is an uppercase character.
|
static boolean |
isValidCodePoint(int codePoint)
Determines whether the specified code point is a valid
Unicode code point value.
|
static boolean |
isWhitespace(char ch)
Determines if the specified character is white space according to Java.
|
static boolean |
isWhitespace(int codePoint)
Determines if the specified character (Unicode code point) is white space according to Java.
|
static char |
lowSurrogate(int codePoint)
Returns the trailing surrogate (a
low surrogate code unit) of the
surrogate pair representing the specified supplementary character (Unicode code point) in the UTF-16 encoding.
|
static int |
offsetByCodePoints(char[] a, int start, int count, int index, int codePointOffset)
Returns the index within the given
char subarray that is offset from the given
index by
codePointOffset code points.
|
static int |
offsetByCodePoints(CharSequence
Returns the index within the given char sequence that is offset from the given
index by
codePointOffset code points.
|
static char |
reverseBytes(char ch)
Returns the value obtained by reversing the order of the bytes in the specified
char value.
|
static char[] |
toChars(int codePoint)
Converts the specified character (Unicode code point) to its UTF-16 representation stored in a
char array.
|
static int |
toChars(int codePoint, char[] dst, int dstIndex)
Converts the specified character (Unicode code point) to its UTF-16 representation.
|
static int |
toCodePoint(char high, char low)
Converts the specified surrogate pair to its supplementary code point value.
|
static char |
toLowerCase(char ch)
Converts the character argument to lowercase using case mapping information from the UnicodeData file.
|
static int |
toLowerCase(int codePoint)
Converts the character (Unicode code point) argument to lowercase using case mapping information from the UnicodeData file.
|
String |
toString()
Returns a
String object representing this
Character 's value.
|
static String |
toString(char c)
Returns a
String object representing the specified
char .
|
static char |
toTitleCase(char ch)
Converts the character argument to titlecase using case mapping information from the UnicodeData file.
|
static int |
toTitleCase(int codePoint)
Converts the character (Unicode code point) argument to titlecase using case mapping information from the UnicodeData file.
|
static char |
toUpperCase(char ch)
Converts the character argument to uppercase using case mapping information from the UnicodeData file.
|
static int |
toUpperCase(int codePoint)
Converts the character (Unicode code point) argument to uppercase using case mapping information from the UnicodeData file.
|
static Character |
valueOf(char c)
Returns a
Character instance representing the specified
char value.
|
public static final int MIN_RADIX
digit
method, the
forDigit
method, and the
toString
method of class
Integer
.
public static final int MAX_RADIX
digit
method, the
forDigit
method, and the
toString
method of class
Integer
.
public static final char MIN_VALUE
char
,
'\u0000'
.
public static final char MAX_VALUE
char
,
'\uFFFF'
.
public static final Class<Character > TYPE
Class
instance representing the primitive type
char
.
public static final byte UNASSIGNED
public static final byte UPPERCASE_LETTER
public static final byte LOWERCASE_LETTER
public static final byte TITLECASE_LETTER
public static final byte MODIFIER_LETTER
public static final byte OTHER_LETTER
public static final byte NON_SPACING_MARK
public static final byte ENCLOSING_MARK
public static final byte COMBINING_SPACING_MARK
public static final byte DECIMAL_DIGIT_NUMBER
public static final byte LETTER_NUMBER
public static final byte OTHER_NUMBER
public static final byte SPACE_SEPARATOR
public static final byte LINE_SEPARATOR
public static final byte PARAGRAPH_SEPARATOR
public static final byte CONTROL
public static final byte FORMAT
public static final byte PRIVATE_USE
public static final byte SURROGATE
public static final byte DASH_PUNCTUATION
public static final byte START_PUNCTUATION
public static final byte END_PUNCTUATION
public static final byte CONNECTOR_PUNCTUATION
public static final byte OTHER_PUNCTUATION
public static final byte MATH_SYMBOL
public static final byte CURRENCY_SYMBOL
public static final byte MODIFIER_SYMBOL
public static final byte OTHER_SYMBOL
public static final byte INITIAL_QUOTE_PUNCTUATION
public static final byte FINAL_QUOTE_PUNCTUATION
public static final byte DIRECTIONALITY_UNDEFINED
char
values have undefined directionality in the Unicode specification.
public static final byte DIRECTIONALITY_LEFT_TO_RIGHT
public static final byte DIRECTIONALITY_RIGHT_TO_LEFT
public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC
public static final byte DIRECTIONALITY_EUROPEAN_NUMBER
public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR
public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR
public static final byte DIRECTIONALITY_ARABIC_NUMBER
public static final byte DIRECTIONALITY_COMMON_NUMBER_SEPARATOR
public static final byte DIRECTIONALITY_NONSPACING_MARK
public static final byte DIRECTIONALITY_BOUNDARY_NEUTRAL
public static final byte DIRECTIONALITY_PARAGRAPH_SEPARATOR
public static final byte DIRECTIONALITY_SEGMENT_SEPARATOR
public static final byte DIRECTIONALITY_WHITESPACE
public static final byte DIRECTIONALITY_OTHER_NEUTRALS
public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING
public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE
public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING
public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE
public static final byte DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
public static final char MIN_HIGH_SURROGATE
'\uD800'
. A high-surrogate is also known as a
leading-surrogate.
public static final char MAX_HIGH_SURROGATE
'\uDBFF'
. A high-surrogate is also known as a
leading-surrogate.
public static final char MIN_LOW_SURROGATE
'\uDC00'
. A low-surrogate is also known as a
trailing-surrogate.
public static final char MAX_LOW_SURROGATE
'\uDFFF'
. A low-surrogate is also known as a
trailing-surrogate.
public static final char MIN_SURROGATE
'\uD800'
.
public static final char MAX_SURROGATE
'\uDFFF'
.
public static final int MIN_SUPPLEMENTARY_CODE_POINT
U+10000
.
public static final int MIN_CODE_POINT
U+0000
.
public static final int MAX_CODE_POINT
U+10FFFF
.
public static final int SIZE
16
.
public static final int BYTES
char
value in unsigned binary form.
public Character(char value)
Character
object that represents the specified
char
value.
value
- the value to be represented by the
Character
object.
public static CharactervalueOf(char c)
Character(char)
, as this method is likely to yield significantly better space and time performance by caching frequently requested values. This method will always cache values in the range
'\u0000'
to
'\u007F'
, inclusive, and may cache other values outside of this range.
c
- a char value.
public char charValue()
Character
object.
char
value represented by this object.
public int hashCode()
Character
; equal to the result of invoking
charValue()
.
hashCode
in class
Object
Character
Object.equals(java.lang.Object)
,
System.identityHashCode(java.lang.Object)
public static int hashCode(char value)
char
value; compatible with
Character.hashCode()
.
value
- The
char
for which to return a hash code.
char
value.
public boolean equals(Objectobj)
true
if and only if the argument is not
null
and is a
Character
object that represents the same
char
value as this object.
equals
in class
Object
obj
- the object to compare with.
true
if the objects are the same;
false
otherwise.
Object.hashCode()
,
HashMap
public StringtoString()
String
object representing this
Character
's value. The result is a string of length 1 whose sole component is the primitive
char
value represented by this
Character
object.
public static StringtoString(char c)
String
object representing the specified
char
. The result is a string of length 1 consisting solely of the specified
char
.
c
- the
char
to be converted
char
public static boolean isValidCodePoint(int codePoint)
codePoint
- the Unicode code point to be tested
true
if the specified code point value is between
MIN_CODE_POINT
and
MAX_CODE_POINT
inclusive;
false
otherwise.
public static boolean isBmpCodePoint(int codePoint)
char
.
public static boolean isSupplementaryCodePoint(int codePoint)
codePoint
- the character (Unicode code point) to be tested
true
if the specified code point is between
MIN_SUPPLEMENTARY_CODE_POINT
and
MAX_CODE_POINT
inclusive;
false
otherwise.
public static boolean isHighSurrogate(char ch)
char
value is a
Unicode high-surrogate code unit (also known as
leading-surrogate code unit).
Such values do not represent characters by themselves, but are used in the representation of supplementary characters in the UTF-16 encoding.
ch
- the
char
value to be tested.
true
if the
char
value is between
MIN_HIGH_SURROGATE
and
MAX_HIGH_SURROGATE
inclusive;
false
otherwise.
isLowSurrogate(char)
,
Character.UnicodeBlock.of(int)
public static boolean isLowSurrogate(char ch)
char
value is a
Unicode low-surrogate code unit (also known as
trailing-surrogate code unit).
Such values do not represent characters by themselves, but are used in the representation of supplementary characters in the UTF-16 encoding.
ch
- the
char
value to be tested.
true
if the
char
value is between
MIN_LOW_SURROGATE
and
MAX_LOW_SURROGATE
inclusive;
false
otherwise.
isHighSurrogate(char)
public static boolean isSurrogate(char ch)
char
value is a Unicode
surrogate code unit.
Such values do not represent characters by themselves, but are used in the representation of supplementary characters in the UTF-16 encoding.
A char value is a surrogate code unit if and only if it is either a low-surrogate code unit or a high-surrogate code unit.
ch
- the
char
value to be tested.
true
if the
char
value is between
MIN_SURROGATE
and
MAX_SURROGATE
inclusive;
false
otherwise.
public static boolean isSurrogatePair(char high, char low)
char
values is a valid
Unicode surrogate pair.
This method is equivalent to the expression:
isHighSurrogate(high) && isLowSurrogate(low)
high
- the high-surrogate code value to be tested
low
- the low-surrogate code value to be tested
true
if the specified high and low-surrogate code values represent a valid surrogate pair;
false
otherwise.
public static int charCount(int codePoint)
char
values needed to represent the specified character (Unicode code point). If the specified character is equal to or greater than 0x10000, then the method returns 2. Otherwise, the method returns 1.
This method doesn't validate the specified character to be a valid Unicode code point. The caller must validate the character value using isValidCodePoint
if necessary.
codePoint
- the character (Unicode code point) to be tested.
isSupplementaryCodePoint(int)
public static int toCodePoint(char high, char low)
isSurrogatePair
if necessary.
high
- the high-surrogate code unit
low
- the low-surrogate code unit
public static int codePointAt(CharSequenceseq, int index)
CharSequence
. If the
char
value at the given index in the
CharSequence
is in the high-surrogate range, the following index is less than the length of the
CharSequence
, and the
char
value at the following index is in the low-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the
char
value at the given index is returned.
seq
- a sequence of
char
values (Unicode code units)
index
- the index to the
char
values (Unicode code units) in
seq
to be converted
NullPointerException
- if
seq
is null.
IndexOutOfBoundsException
- if the value
index
is negative or not less than
seq.length()
.
public static int codePointAt(char[] a, int index)
char
array. If the
char
value at the given index in the
char
array is in the high-surrogate range, the following index is less than the length of the
char
array, and the
char
value at the following index is in the low-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the
char
value at the given index is returned.
a
- the
char
array
index
- the index to the
char
values (Unicode code units) in the
char
array to be converted
NullPointerException
- if
a
is null.
IndexOutOfBoundsException
- if the value
index
is negative or not less than the length of the
char
array.
public static int codePointAt(char[] a, int index, int limit)
char
array, where only array elements with
index
less than
limit
can be used. If the
char
value at the given index in the
char
array is in the high-surrogate range, the following index is less than the
limit
, and the
char
value at the following index is in the low-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the
char
value at the given index is returned.
a
- the
char
array
index
- the index to the
char
values (Unicode code units) in the
char
array to be converted
limit
- the index after the last array element that can be used in the
char
array
NullPointerException
- if
a
is null.
IndexOutOfBoundsException
- if the
index
argument is negative or not less than the
limit
argument, or if the
limit
argument is negative or greater than the length of the
char
array.
public static int codePointBefore(CharSequenceseq, int index)
CharSequence
. If the
char
value at
(index - 1)
in the
CharSequence
is in the low-surrogate range,
(index - 2)
is not negative, and the
char
value at
(index - 2)
in the
CharSequence
is in the high-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the
char
value at
(index - 1)
is returned.
seq
- the
CharSequence
instance
index
- the index following the code point that should be returned
NullPointerException
- if
seq
is null.
IndexOutOfBoundsException
- if the
index
argument is less than 1 or greater than
seq.length()
.
public static int codePointBefore(char[] a, int index)
char
array. If the
char
value at
(index - 1)
in the
char
array is in the low-surrogate range,
(index - 2)
is not negative, and the
char
value at
(index - 2)
in the
char
array is in the high-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the
char
value at
(index - 1)
is returned.
a
- the
char
array
index
- the index following the code point that should be returned
NullPointerException
- if
a
is null.
IndexOutOfBoundsException
- if the
index
argument is less than 1 or greater than the length of the
char
array
public static int codePointBefore(char[] a, int index, int start)
char
array, where only array elements with
index
greater than or equal to
start
can be used. If the
char
value at
(index - 1)
in the
char
array is in the low-surrogate range,
(index - 2)
is not less than
start
, and the
char
value at
(index - 2)
in the
char
array is in the high-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the
char
value at
(index - 1)
is returned.
a
- the
char
array
index
- the index following the code point that should be returned
start
- the index of the first array element in the
char
array
NullPointerException
- if
a
is null.
IndexOutOfBoundsException
- if the
index
argument is not greater than the
start
argument or is greater than the length of the
char
array, or if the
start
argument is negative or not less than the length of the
char
array.
public static char highSurrogate(int codePoint)
char
is returned.
If isSupplementaryCodePoint(x)
is true
, then isHighSurrogate
(highSurrogate(x))
and toCodePoint
(highSurrogate(x),
lowSurrogate
(x)) == x
are also always true
.
codePoint
- a supplementary character (Unicode code point)
public static char lowSurrogate(int codePoint)
char
is returned.
If isSupplementaryCodePoint(x)
is true
, then isLowSurrogate
(lowSurrogate(x))
and toCodePoint
(
highSurrogate
(x), lowSurrogate(x)) == x
are also always true
.
codePoint
- a supplementary character (Unicode code point)
public static int toChars(int codePoint, char[] dst, int dstIndex)
dst[dstIndex]
, and 1 is returned. If the specified code point is a supplementary character, its surrogate values are stored in
dst[dstIndex]
(high-surrogate) and
dst[dstIndex+1]
(low-surrogate), and 2 is returned.
codePoint
- the character (Unicode code point) to be converted.
dst
- an array of
char
in which the
codePoint
's UTF-16 value is stored.
dstIndex
- the start index into the
dst
array where the converted value is stored.
IllegalArgumentException
- if the specified
codePoint
is not a valid Unicode code point.
NullPointerException
- if the specified
dst
is null.
IndexOutOfBoundsException
- if
dstIndex
is negative or not less than
dst.length
, or if
dst
at
dstIndex
doesn't have enough array element(s) to store the resulting
char
value(s). (If
dstIndex
is equal to
dst.length-1
and the specified
codePoint
is a supplementary character, the high-surrogate value is not stored in
dst[dstIndex]
.)
public static char[] toChars(int codePoint)
char
array. If the specified code point is a BMP (Basic Multilingual Plane or Plane 0) value, the resulting
char
array has the same value as
codePoint
. If the specified code point is a supplementary code point, the resulting
char
array has the corresponding surrogate pair.
codePoint
- a Unicode code point
char
array having
codePoint
's UTF-16 representation.
IllegalArgumentException
- if the specified
codePoint
is not a valid Unicode code point.
public static int codePointCount(CharSequenceseq, int beginIndex, int endIndex)
beginIndex
and extends to the
char
at index
endIndex - 1
. Thus the length (in
char
s) of the text range is
endIndex-beginIndex
. Unpaired surrogates within the text range count as one code point each.
seq
- the char sequence
beginIndex
- the index to the first
char
of the text range.
endIndex
- the index after the last
char
of the text range.
NullPointerException
- if
seq
is null.
IndexOutOfBoundsException
- if the
beginIndex
is negative, or
endIndex
is larger than the length of the given sequence, or
beginIndex
is larger than
endIndex
.
public static int codePointCount(char[] a, int offset, int count)
char
array argument. The
offset
argument is the index of the first
char
of the subarray and the
count
argument specifies the length of the subarray in
char
s. Unpaired surrogates within the subarray count as one code point each.
a
- the
char
array
offset
- the index of the first
char
in the given
char
array
count
- the length of the subarray in
char
s
NullPointerException
- if
a
is null.
IndexOutOfBoundsException
- if
offset
or
count
is negative, or if
offset + count
is larger than the length of the given array.
public static int offsetByCodePoints(CharSequenceseq, int index, int codePointOffset)
index
by
codePointOffset
code points. Unpaired surrogates within the text range given by
index
and
codePointOffset
count as one code point each.
seq
- the char sequence
index
- the index to be offset
codePointOffset
- the offset in code points
NullPointerException
- if
seq
is null.
IndexOutOfBoundsException
- if
index
is negative or larger then the length of the char sequence, or if
codePointOffset
is positive and the subsequence starting with
index
has fewer than
codePointOffset
code points, or if
codePointOffset
is negative and the subsequence before
index
has fewer than the absolute value of
codePointOffset
code points.
public static int offsetByCodePoints(char[] a, int start, int count, int index, int codePointOffset)
char
subarray that is offset from the given
index
by
codePointOffset
code points. The
start
and
count
arguments specify a subarray of the
char
array. Unpaired surrogates within the text range given by
index
and
codePointOffset
count as one code point each.
a
- the
char
array
start
- the index of the first
char
of the subarray
count
- the length of the subarray in
char
s
index
- the index to be offset
codePointOffset
- the offset in code points
NullPointerException
- if
a
is null.
IndexOutOfBoundsException
- if
start
or
count
is negative, or if
start + count
is larger than the length of the given array, or if
index
is less than
start
or larger then
start + count
, or if
codePointOffset
is positive and the text range starting with
index
and ending with
start + count - 1
has fewer than
codePointOffset
code points, or if
codePointOffset
is negative and the text range starting with
start
and ending with
index - 1
has fewer than the absolute value of
codePointOffset
code points.
public static boolean isLowerCase(char ch)
A character is lowercase if its general category type, provided by Character.getType(ch)
, is LOWERCASE_LETTER
, or it has contributory property Other_Lowercase as defined by the Unicode Standard.
The following are examples of lowercase characters:
a b c d e f g h i j k l m n o p q r s t u v w x y z '\u00DF' '\u00E0' '\u00E1' '\u00E2' '\u00E3' '\u00E4' '\u00E5' '\u00E6' '\u00E7' '\u00E8' '\u00E9' '\u00EA' '\u00EB' '\u00EC' '\u00ED' '\u00EE' '\u00EF' '\u00F0' '\u00F1' '\u00F2' '\u00F3' '\u00F4' '\u00F5' '\u00F6' '\u00F8' '\u00F9' '\u00FA' '\u00FB' '\u00FC' '\u00FD' '\u00FE' '\u00FF'
Many other Unicode characters are lowercase too.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isLowerCase(int)
method.
ch
- the character to be tested.
true
if the character is lowercase;
false
otherwise.
isLowerCase(char)
,
isTitleCase(char)
,
toLowerCase(char)
,
getType(char)
public static boolean isLowerCase(int codePoint)
A character is lowercase if its general category type, provided by getType(codePoint)
, is LOWERCASE_LETTER
, or it has contributory property Other_Lowercase as defined by the Unicode Standard.
The following are examples of lowercase characters:
a b c d e f g h i j k l m n o p q r s t u v w x y z '\u00DF' '\u00E0' '\u00E1' '\u00E2' '\u00E3' '\u00E4' '\u00E5' '\u00E6' '\u00E7' '\u00E8' '\u00E9' '\u00EA' '\u00EB' '\u00EC' '\u00ED' '\u00EE' '\u00EF' '\u00F0' '\u00F1' '\u00F2' '\u00F3' '\u00F4' '\u00F5' '\u00F6' '\u00F8' '\u00F9' '\u00FA' '\u00FB' '\u00FC' '\u00FD' '\u00FE' '\u00FF'
Many other Unicode characters are lowercase too.
codePoint
- the character (Unicode code point) to be tested.
true
if the character is lowercase;
false
otherwise.
isLowerCase(int)
,
isTitleCase(int)
,
toLowerCase(int)
,
getType(int)
public static boolean isUpperCase(char ch)
A character is uppercase if its general category type, provided by Character.getType(ch)
, is UPPERCASE_LETTER
. or it has contributory property Other_Uppercase as defined by the Unicode Standard.
The following are examples of uppercase characters:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z '\u00C0' '\u00C1' '\u00C2' '\u00C3' '\u00C4' '\u00C5' '\u00C6' '\u00C7' '\u00C8' '\u00C9' '\u00CA' '\u00CB' '\u00CC' '\u00CD' '\u00CE' '\u00CF' '\u00D0' '\u00D1' '\u00D2' '\u00D3' '\u00D4' '\u00D5' '\u00D6' '\u00D8' '\u00D9' '\u00DA' '\u00DB' '\u00DC' '\u00DD' '\u00DE'
Many other Unicode characters are uppercase too.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isUpperCase(int)
method.
ch
- the character to be tested.
true
if the character is uppercase;
false
otherwise.
isLowerCase(char)
,
isTitleCase(char)
,
toUpperCase(char)
,
getType(char)
public static boolean isUpperCase(int codePoint)
A character is uppercase if its general category type, provided by getType(codePoint)
, is UPPERCASE_LETTER
, or it has contributory property Other_Uppercase as defined by the Unicode Standard.
The following are examples of uppercase characters:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z '\u00C0' '\u00C1' '\u00C2' '\u00C3' '\u00C4' '\u00C5' '\u00C6' '\u00C7' '\u00C8' '\u00C9' '\u00CA' '\u00CB' '\u00CC' '\u00CD' '\u00CE' '\u00CF' '\u00D0' '\u00D1' '\u00D2' '\u00D3' '\u00D4' '\u00D5' '\u00D6' '\u00D8' '\u00D9' '\u00DA' '\u00DB' '\u00DC' '\u00DD' '\u00DE'
Many other Unicode characters are uppercase too.
codePoint
- the character (Unicode code point) to be tested.
true
if the character is uppercase;
false
otherwise.
isLowerCase(int)
,
isTitleCase(int)
,
toUpperCase(int)
,
getType(int)
public static boolean isTitleCase(char ch)
A character is a titlecase character if its general category type, provided by Character.getType(ch)
, is TITLECASE_LETTER
.
Some characters look like pairs of Latin letters. For example, there is an uppercase letter that looks like "LJ" and has a corresponding lowercase letter that looks like "lj". A third form, which looks like "Lj", is the appropriate form to use when rendering a word in lowercase with initial capitals, as for a book title.
These are some of the Unicode characters for which this method returns true
:
LATIN CAPITAL LETTER D WITH SMALL LETTER Z WITH CARON
LATIN CAPITAL LETTER L WITH SMALL LETTER J
LATIN CAPITAL LETTER N WITH SMALL LETTER J
LATIN CAPITAL LETTER D WITH SMALL LETTER Z
Many other Unicode characters are titlecase too.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isTitleCase(int)
method.
ch
- the character to be tested.
true
if the character is titlecase;
false
otherwise.
isLowerCase(char)
,
isUpperCase(char)
,
toTitleCase(char)
,
getType(char)
public static boolean isTitleCase(int codePoint)
A character is a titlecase character if its general category type, provided by getType(codePoint)
, is TITLECASE_LETTER
.
Some characters look like pairs of Latin letters. For example, there is an uppercase letter that looks like "LJ" and has a corresponding lowercase letter that looks like "lj". A third form, which looks like "Lj", is the appropriate form to use when rendering a word in lowercase with initial capitals, as for a book title.
These are some of the Unicode characters for which this method returns true
:
LATIN CAPITAL LETTER D WITH SMALL LETTER Z WITH CARON
LATIN CAPITAL LETTER L WITH SMALL LETTER J
LATIN CAPITAL LETTER N WITH SMALL LETTER J
LATIN CAPITAL LETTER D WITH SMALL LETTER Z
Many other Unicode characters are titlecase too.
codePoint
- the character (Unicode code point) to be tested.
true
if the character is titlecase;
false
otherwise.
isLowerCase(int)
,
isUpperCase(int)
,
toTitleCase(int)
,
getType(int)
public static boolean isDigit(char ch)
A character is a digit if its general category type, provided by Character.getType(ch)
, is DECIMAL_DIGIT_NUMBER
.
Some Unicode character ranges that contain digits:
'\u0030'
through '\u0039'
, ISO-LATIN-1 digits ('0'
through '9'
) '\u0660'
through '\u0669'
, Arabic-Indic digits '\u06F0'
through '\u06F9'
, Extended Arabic-Indic digits '\u0966'
through '\u096F'
, Devanagari digits '\uFF10'
through '\uFF19'
, Fullwidth digits Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isDigit(int)
method.
ch
- the character to be tested.
true
if the character is a digit;
false
otherwise.
digit(char, int)
,
forDigit(int, int)
,
getType(char)
public static boolean isDigit(int codePoint)
A character is a digit if its general category type, provided by getType(codePoint)
, is DECIMAL_DIGIT_NUMBER
.
Some Unicode character ranges that contain digits:
'\u0030'
through '\u0039'
, ISO-LATIN-1 digits ('0'
through '9'
) '\u0660'
through '\u0669'
, Arabic-Indic digits '\u06F0'
through '\u06F9'
, Extended Arabic-Indic digits '\u0966'
through '\u096F'
, Devanagari digits '\uFF10'
through '\uFF19'
, Fullwidth digits codePoint
- the character (Unicode code point) to be tested.
true
if the character is a digit;
false
otherwise.
forDigit(int, int)
,
getType(int)
public static boolean isDefined(char ch)
A character is defined if at least one of the following is true:
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isDefined(int)
method.
ch
- the character to be tested
true
if the character has a defined meaning in Unicode;
false
otherwise.
isDigit(char)
,
isLetter(char)
,
isLetterOrDigit(char)
,
isLowerCase(char)
,
isTitleCase(char)
,
isUpperCase(char)
public static boolean isDefined(int codePoint)
A character is defined if at least one of the following is true:
codePoint
- the character (Unicode code point) to be tested.
true
if the character has a defined meaning in Unicode;
false
otherwise.
isDigit(int)
,
isLetter(int)
,
isLetterOrDigit(int)
,
isLowerCase(int)
,
isTitleCase(int)
,
isUpperCase(int)
public static boolean isLetter(char ch)
A character is considered to be a letter if its general category type, provided by Character.getType(ch)
, is any of the following:
UPPERCASE_LETTER
LOWERCASE_LETTER
TITLECASE_LETTER
MODIFIER_LETTER
OTHER_LETTER
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isLetter(int)
method.
ch
- the character to be tested.
true
if the character is a letter;
false
otherwise.
isDigit(char)
,
isJavaIdentifierStart(char)
,
isJavaLetter(char)
,
isJavaLetterOrDigit(char)
,
isLetterOrDigit(char)
,
isLowerCase(char)
,
isTitleCase(char)
,
isUnicodeIdentifierStart(char)
,
isUpperCase(char)
public static boolean isLetter(int codePoint)
A character is considered to be a letter if its general category type, provided by getType(codePoint)
, is any of the following:
UPPERCASE_LETTER
LOWERCASE_LETTER
TITLECASE_LETTER
MODIFIER_LETTER
OTHER_LETTER
codePoint
- the character (Unicode code point) to be tested.
true
if the character is a letter;
false
otherwise.
isDigit(int)
,
isJavaIdentifierStart(int)
,
isLetterOrDigit(int)
,
isLowerCase(int)
,
isTitleCase(int)
,
isUnicodeIdentifierStart(int)
,
isUpperCase(int)
public static boolean isLetterOrDigit(char ch)
A character is considered to be a letter or digit if either Character.isLetter(char ch)
or Character.isDigit(char ch)
returns true
for the character.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isLetterOrDigit(int)
method.
ch
- the character to be tested.
true
if the character is a letter or digit;
false
otherwise.
isDigit(char)
,
isJavaIdentifierPart(char)
,
isJavaLetter(char)
,
isJavaLetterOrDigit(char)
,
isLetter(char)
,
isUnicodeIdentifierPart(char)
public static boolean isLetterOrDigit(int codePoint)
A character is considered to be a letter or digit if either isLetter(codePoint)
or isDigit(codePoint)
returns true
for the character.
codePoint
- the character (Unicode code point) to be tested.
true
if the character is a letter or digit;
false
otherwise.
isDigit(int)
,
isJavaIdentifierPart(int)
,
isLetter(int)
,
isUnicodeIdentifierPart(int)
@Deprecated public static boolean isJavaLetter(char ch)
A character may start a Java identifier if and only if one of the following is true:
isLetter(ch)
returns true
getType(ch)
returns LETTER_NUMBER
ch
is a currency symbol (such as '$'
) ch
is a connecting punctuation character (such as '_'
). ch
- the character to be tested.
true
if the character may start a Java identifier;
false
otherwise.
isJavaLetterOrDigit(char)
,
isJavaIdentifierStart(char)
,
isJavaIdentifierPart(char)
,
isLetter(char)
,
isLetterOrDigit(char)
,
isUnicodeIdentifierStart(char)
@Deprecated public static boolean isJavaLetterOrDigit(char ch)
A character may be part of a Java identifier if and only if any of the following are true:
'$'
) '_'
) isIdentifierIgnorable
returns true
for the character. ch
- the character to be tested.
true
if the character may be part of a Java identifier;
false
otherwise.
isJavaLetter(char)
,
isJavaIdentifierStart(char)
,
isJavaIdentifierPart(char)
,
isLetter(char)
,
isLetterOrDigit(char)
,
isUnicodeIdentifierPart(char)
,
isIdentifierIgnorable(char)
public static boolean isAlphabetic(int codePoint)
A character is considered to be alphabetic if its general category type, provided by getType(codePoint)
, is any of the following:
UPPERCASE_LETTER
LOWERCASE_LETTER
TITLECASE_LETTER
MODIFIER_LETTER
OTHER_LETTER
LETTER_NUMBER
codePoint
- the character (Unicode code point) to be tested.
true
if the character is a Unicode alphabet character,
false
otherwise.
public static boolean isIdeographic(int codePoint)
codePoint
- the character (Unicode code point) to be tested.
true
if the character is a Unicode ideograph character,
false
otherwise.
public static boolean isJavaIdentifierStart(char ch)
A character may start a Java identifier if and only if one of the following conditions is true:
isLetter(ch)
returns true
getType(ch)
returns LETTER_NUMBER
ch
is a currency symbol (such as '$'
) ch
is a connecting punctuation character (such as '_'
). Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isJavaIdentifierStart(int)
method.
ch
- the character to be tested.
true
if the character may start a Java identifier;
false
otherwise.
isJavaIdentifierPart(char)
,
isLetter(char)
,
isUnicodeIdentifierStart(char)
,
SourceVersion.isIdentifier(CharSequence)
public static boolean isJavaIdentifierStart(int codePoint)
A character may start a Java identifier if and only if one of the following conditions is true:
isLetter(codePoint)
returns true
getType(codePoint)
returns LETTER_NUMBER
'$'
) '_'
). codePoint
- the character (Unicode code point) to be tested.
true
if the character may start a Java identifier;
false
otherwise.
isJavaIdentifierPart(int)
,
isLetter(int)
,
isUnicodeIdentifierStart(int)
,
SourceVersion.isIdentifier(CharSequence)
public static boolean isJavaIdentifierPart(char ch)
A character may be part of a Java identifier if any of the following are true:
'$'
) '_'
) isIdentifierIgnorable
returns true
for the character Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isJavaIdentifierPart(int)
method.
ch
- the character to be tested.
true
if the character may be part of a Java identifier;
false
otherwise.
isIdentifierIgnorable(char)
,
isJavaIdentifierStart(char)
,
isLetterOrDigit(char)
,
isUnicodeIdentifierPart(char)
,
SourceVersion.isIdentifier(CharSequence)
public static boolean isJavaIdentifierPart(int codePoint)
A character may be part of a Java identifier if any of the following are true:
'$'
) '_'
) isIdentifierIgnorable(codePoint)
returns true
for the character codePoint
- the character (Unicode code point) to be tested.
true
if the character may be part of a Java identifier;
false
otherwise.
isIdentifierIgnorable(int)
,
isJavaIdentifierStart(int)
,
isLetterOrDigit(int)
,
isUnicodeIdentifierPart(int)
,
SourceVersion.isIdentifier(CharSequence)
public static boolean isUnicodeIdentifierStart(char ch)
A character may start a Unicode identifier if and only if one of the following conditions is true:
isLetter(ch)
returns true
getType(ch)
returns LETTER_NUMBER
. Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isUnicodeIdentifierStart(int)
method.
ch
- the character to be tested.
true
if the character may start a Unicode identifier;
false
otherwise.
isJavaIdentifierStart(char)
,
isLetter(char)
,
isUnicodeIdentifierPart(char)
public static boolean isUnicodeIdentifierStart(int codePoint)
A character may start a Unicode identifier if and only if one of the following conditions is true:
isLetter(codePoint)
returns true
getType(codePoint)
returns LETTER_NUMBER
. codePoint
- the character (Unicode code point) to be tested.
true
if the character may start a Unicode identifier;
false
otherwise.
isJavaIdentifierStart(int)
,
isLetter(int)
,
isUnicodeIdentifierPart(int)
public static boolean isUnicodeIdentifierPart(char ch)
A character may be part of a Unicode identifier if and only if one of the following statements is true:
'_'
) isIdentifierIgnorable
returns true
for this character. Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isUnicodeIdentifierPart(int)
method.
ch
- the character to be tested.
true
if the character may be part of a Unicode identifier;
false
otherwise.
isIdentifierIgnorable(char)
,
isJavaIdentifierPart(char)
,
isLetterOrDigit(char)
,
isUnicodeIdentifierStart(char)
public static boolean isUnicodeIdentifierPart(int codePoint)
A character may be part of a Unicode identifier if and only if one of the following statements is true:
'_'
) isIdentifierIgnorable
returns true
for this character. codePoint
- the character (Unicode code point) to be tested.
true
if the character may be part of a Unicode identifier;
false
otherwise.
isIdentifierIgnorable(int)
,
isJavaIdentifierPart(int)
,
isLetterOrDigit(int)
,
isUnicodeIdentifierStart(int)
public static boolean isIdentifierIgnorable(char ch)
The following Unicode characters are ignorable in a Java identifier or a Unicode identifier:
'\u0000'
through '\u0008'
'\u000E'
through '\u001B'
'\u007F'
through '\u009F'
FORMAT
general category value Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isIdentifierIgnorable(int)
method.
ch
- the character to be tested.
true
if the character is an ignorable control character that may be part of a Java or Unicode identifier;
false
otherwise.
isJavaIdentifierPart(char)
,
isUnicodeIdentifierPart(char)
public static boolean isIdentifierIgnorable(int codePoint)
The following Unicode characters are ignorable in a Java identifier or a Unicode identifier:
'\u0000'
through '\u0008'
'\u000E'
through '\u001B'
'\u007F'
through '\u009F'
FORMAT
general category value codePoint
- the character (Unicode code point) to be tested.
true
if the character is an ignorable control character that may be part of a Java or Unicode identifier;
false
otherwise.
isJavaIdentifierPart(int)
,
isUnicodeIdentifierPart(int)
public static char toLowerCase(char ch)
Note that Character.isLowerCase(Character.toLowerCase(ch))
does not always return true
for some ranges of characters, particularly those that are symbols or ideographs.
In general, String
should be used to map characters to lowercase. String
case mapping methods have several benefits over Character
case mapping methods. String
case mapping methods can perform locale-sensitive mappings, context-sensitive mappings, and 1:M character mappings, whereas the Character
case mapping methods cannot.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the toLowerCase(int)
method.
ch
- the character to be converted.
isLowerCase(char)
,
String.toLowerCase()
public static int toLowerCase(int codePoint)
Note that Character.isLowerCase(Character.toLowerCase(codePoint))
does not always return true
for some ranges of characters, particularly those that are symbols or ideographs.
In general, String
should be used to map characters to lowercase. String
case mapping methods have several benefits over Character
case mapping methods. String
case mapping methods can perform locale-sensitive mappings, context-sensitive mappings, and 1:M character mappings, whereas the Character
case mapping methods cannot.
codePoint
- the character (Unicode code point) to be converted.
isLowerCase(int)
,
String.toLowerCase()
public static char toUpperCase(char ch)
Note that Character.isUpperCase(Character.toUpperCase(ch))
does not always return true
for some ranges of characters, particularly those that are symbols or ideographs.
In general, String
should be used to map characters to uppercase. String
case mapping methods have several benefits over Character
case mapping methods. String
case mapping methods can perform locale-sensitive mappings, context-sensitive mappings, and 1:M character mappings, whereas the Character
case mapping methods cannot.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the toUpperCase(int)
method.
ch
- the character to be converted.
isUpperCase(char)
,
String.toUpperCase()
public static int toUpperCase(int codePoint)
Note that Character.isUpperCase(Character.toUpperCase(codePoint))
does not always return true
for some ranges of characters, particularly those that are symbols or ideographs.
In general, String
should be used to map characters to uppercase. String
case mapping methods have several benefits over Character
case mapping methods. String
case mapping methods can perform locale-sensitive mappings, context-sensitive mappings, and 1:M character mappings, whereas the Character
case mapping methods cannot.
codePoint
- the character (Unicode code point) to be converted.
isUpperCase(int)
,
String.toUpperCase()
public static char toTitleCase(char ch)
char
argument is already a titlecase
char
, the same
char
value will be returned.
Note that Character.isTitleCase(Character.toTitleCase(ch))
does not always return true
for some ranges of characters.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the toTitleCase(int)
method.
ch
- the character to be converted.
isTitleCase(char)
,
toLowerCase(char)
,
toUpperCase(char)
public static int toTitleCase(int codePoint)
Note that Character.isTitleCase(Character.toTitleCase(codePoint))
does not always return true
for some ranges of characters.
codePoint
- the character (Unicode code point) to be converted.
isTitleCase(int)
,
toLowerCase(int)
,
toUpperCase(int)
public static int digit(char ch, int radix)
ch
in the specified radix.
If the radix is not in the range MIN_RADIX
≤ radix
≤ MAX_RADIX
or if the value of ch
is not a valid digit in the specified radix, -1
is returned. A character is a valid digit if at least one of the following is true:
isDigit
is true
of the character and the Unicode decimal digit value of the character (or its single-character decomposition) is less than the specified radix. In this case the decimal digit value is returned. 'A'
through 'Z'
and its code is less than radix + 'A' - 10
. In this case, ch - 'A' + 10
is returned. 'a'
through 'z'
and its code is less than radix + 'a' - 10
. In this case, ch - 'a' + 10
is returned. '\uFF21'
) through Z ('\uFF3A'
) and its code is less than radix + '\uFF21' - 10
. In this case, ch - '\uFF21' + 10
is returned. '\uFF41'
) through z ('\uFF5A'
) and its code is less than radix + '\uFF41' - 10
. In this case, ch - '\uFF41' + 10
is returned. Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the digit(int, int)
method.
ch
- the character to be converted.
radix
- the radix.
forDigit(int, int)
,
isDigit(char)
public static int digit(int codePoint, int radix)
If the radix is not in the range MIN_RADIX
≤ radix
≤ MAX_RADIX
or if the character is not a valid digit in the specified radix, -1
is returned. A character is a valid digit if at least one of the following is true:
isDigit(codePoint)
is true
of the character and the Unicode decimal digit value of the character (or its single-character decomposition) is less than the specified radix. In this case the decimal digit value is returned. 'A'
through 'Z'
and its code is less than radix + 'A' - 10
. In this case, codePoint - 'A' + 10
is returned. 'a'
through 'z'
and its code is less than radix + 'a' - 10
. In this case, codePoint - 'a' + 10
is returned. '\uFF21'
) through Z ('\uFF3A'
) and its code is less than radix + '\uFF21' - 10
. In this case, codePoint - '\uFF21' + 10
is returned. '\uFF41'
) through z ('\uFF5A'
) and its code is less than radix + '\uFF41'- 10
. In this case, codePoint - '\uFF41' + 10
is returned. codePoint
- the character (Unicode code point) to be converted.
radix
- the radix.
forDigit(int, int)
,
isDigit(int)
public static int getNumericValue(char ch)
int
value that the specified Unicode character represents. For example, the character
'\u216C'
(the roman numeral fifty) will return an int with a value of 50.
The letters A-Z in their uppercase ('\u0041'
through '\u005A'
), lowercase ('\u0061'
through '\u007A'
), and full width variant ('\uFF21'
through '\uFF3A'
and '\uFF41'
through '\uFF5A'
) forms have numeric values from 10 through 35. This is independent of the Unicode specification, which does not assign numeric values to these char
values.
If the character does not have a numeric value, then -1 is returned. If the character has a numeric value that cannot be represented as a nonnegative integer (for example, a fractional value), then -2 is returned.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the getNumericValue(int)
method.
ch
- the character to be converted.
int
value; -2 if the character has a numeric value that is not a nonnegative integer; -1 if the character has no numeric value.
forDigit(int, int)
,
isDigit(char)
public static int getNumericValue(int codePoint)
int
value that the specified character (Unicode code point) represents. For example, the character
'\u216C'
(the Roman numeral fifty) will return an
int
with a value of 50.
The letters A-Z in their uppercase ('\u0041'
through '\u005A'
), lowercase ('\u0061'
through '\u007A'
), and full width variant ('\uFF21'
through '\uFF3A'
and '\uFF41'
through '\uFF5A'
) forms have numeric values from 10 through 35. This is independent of the Unicode specification, which does not assign numeric values to these char
values.
If the character does not have a numeric value, then -1 is returned. If the character has a numeric value that cannot be represented as a nonnegative integer (for example, a fractional value), then -2 is returned.
codePoint
- the character (Unicode code point) to be converted.
int
value; -2 if the character has a numeric value that is not a nonnegative integer; -1 if the character has no numeric value.
forDigit(int, int)
,
isDigit(int)
@Deprecated public static boolean isSpace(char ch)
true
for the following five characters only:
'\t' |
U+0009 |
HORIZONTAL TABULATION |
'\n' |
U+000A |
NEW LINE |
'\f' |
U+000C |
FORM FEED |
'\r' |
U+000D |
CARRIAGE RETURN |
' ' |
U+0020 |
SPACE |
ch
- the character to be tested.
true
if the character is ISO-LATIN-1 white space;
false
otherwise.
isSpaceChar(char)
,
isWhitespace(char)
public static boolean isSpaceChar(char ch)
SPACE_SEPARATOR
LINE_SEPARATOR
PARAGRAPH_SEPARATOR
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isSpaceChar(int)
method.
ch
- the character to be tested.
true
if the character is a space character;
false
otherwise.
isWhitespace(char)
public static boolean isSpaceChar(int codePoint)
codePoint
- the character (Unicode code point) to be tested.
true
if the character is a space character;
false
otherwise.
isWhitespace(int)
public static boolean isWhitespace(char ch)
SPACE_SEPARATOR
, LINE_SEPARATOR
, or PARAGRAPH_SEPARATOR
) but is not also a non-breaking space ('\u00A0'
, '\u2007'
, '\u202F'
). '\t'
, U+0009 HORIZONTAL TABULATION. '\n'
, U+000A LINE FEED. '\u000B'
, U+000B VERTICAL TABULATION. '\f'
, U+000C FORM FEED. '\r'
, U+000D CARRIAGE RETURN. '\u001C'
, U+001C FILE SEPARATOR. '\u001D'
, U+001D GROUP SEPARATOR. '\u001E'
, U+001E RECORD SEPARATOR. '\u001F'
, U+001F UNIT SEPARATOR. Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isWhitespace(int)
method.
ch
- the character to be tested.
true
if the character is a Java whitespace character;
false
otherwise.
isSpaceChar(char)
public static boolean isWhitespace(int codePoint)
SPACE_SEPARATOR
, LINE_SEPARATOR
, or PARAGRAPH_SEPARATOR
) but is not also a non-breaking space ('\u00A0'
, '\u2007'
, '\u202F'
). '\t'
, U+0009 HORIZONTAL TABULATION. '\n'
, U+000A LINE FEED. '\u000B'
, U+000B VERTICAL TABULATION. '\f'
, U+000C FORM FEED. '\r'
, U+000D CARRIAGE RETURN. '\u001C'
, U+001C FILE SEPARATOR. '\u001D'
, U+001D GROUP SEPARATOR. '\u001E'
, U+001E RECORD SEPARATOR. '\u001F'
, U+001F UNIT SEPARATOR. codePoint
- the character (Unicode code point) to be tested.
true
if the character is a Java whitespace character;
false
otherwise.
isSpaceChar(int)
public static boolean isISOControl(char ch)
'\u0000'
through
'\u001F'
or in the range
'\u007F'
through
'\u009F'
.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isISOControl(int)
method.
ch
- the character to be tested.
true
if the character is an ISO control character;
false
otherwise.
isSpaceChar(char)
,
isWhitespace(char)
public static boolean isISOControl(int codePoint)
'\u0000'
through
'\u001F'
or in the range
'\u007F'
through
'\u009F'
.
codePoint
- the character (Unicode code point) to be tested.
true
if the character is an ISO control character;
false
otherwise.
isSpaceChar(int)
,
isWhitespace(int)
public static int getType(char ch)
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the getType(int)
method.
ch
- the character to be tested.
int
representing the character's general category.
COMBINING_SPACING_MARK
,
CONNECTOR_PUNCTUATION
,
CONTROL
,
CURRENCY_SYMBOL
,
DASH_PUNCTUATION
,
DECIMAL_DIGIT_NUMBER
,
ENCLOSING_MARK
,
END_PUNCTUATION
,
FINAL_QUOTE_PUNCTUATION
,
FORMAT
,
INITIAL_QUOTE_PUNCTUATION
,
LETTER_NUMBER
,
LINE_SEPARATOR
,
LOWERCASE_LETTER
,
MATH_SYMBOL
,
MODIFIER_LETTER
,
MODIFIER_SYMBOL
,
NON_SPACING_MARK
,
OTHER_LETTER
,
OTHER_NUMBER
,
OTHER_PUNCTUATION
,
OTHER_SYMBOL
,
PARAGRAPH_SEPARATOR
,
PRIVATE_USE
,
SPACE_SEPARATOR
,
START_PUNCTUATION
,
SURROGATE
,
TITLECASE_LETTER
,
UNASSIGNED
,
UPPERCASE_LETTER
public static int getType(int codePoint)
codePoint
- the character (Unicode code point) to be tested.
int
representing the character's general category.
COMBINING_SPACING_MARK
,
CONNECTOR_PUNCTUATION
,
CONTROL
,
CURRENCY_SYMBOL
,
DASH_PUNCTUATION
,
DECIMAL_DIGIT_NUMBER
,
ENCLOSING_MARK
,
END_PUNCTUATION
,
FINAL_QUOTE_PUNCTUATION
,
FORMAT
,
INITIAL_QUOTE_PUNCTUATION
,
LETTER_NUMBER
,
LINE_SEPARATOR
,
LOWERCASE_LETTER
,
MATH_SYMBOL
,
MODIFIER_LETTER
,
MODIFIER_SYMBOL
,
NON_SPACING_MARK
,
OTHER_LETTER
,
OTHER_NUMBER
,
OTHER_PUNCTUATION
,
OTHER_SYMBOL
,
PARAGRAPH_SEPARATOR
,
PRIVATE_USE
,
SPACE_SEPARATOR
,
START_PUNCTUATION
,
SURROGATE
,
TITLECASE_LETTER
,
UNASSIGNED
,
UPPERCASE_LETTER
public static char forDigit(int digit, int radix)
radix
is not a valid radix, or the value of
digit
is not a valid digit in the specified radix, the null character (
'\u0000'
) is returned.
The radix
argument is valid if it is greater than or equal to MIN_RADIX
and less than or equal to MAX_RADIX
. The digit
argument is valid if 0 <= digit < radix
.
If the digit is less than 10, then '0' + digit
is returned. Otherwise, the value 'a' + digit - 10
is returned.
digit
- the number to convert to a character.
radix
- the radix.
char
representation of the specified digit in the specified radix.
MIN_RADIX
,
MAX_RADIX
,
digit(char, int)
public static byte getDirectionality(char ch)
char
values is
DIRECTIONALITY_UNDEFINED
.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the getDirectionality(int)
method.
ch
-
char
for which the directionality property is requested.
char
value.
DIRECTIONALITY_UNDEFINED
,
DIRECTIONALITY_LEFT_TO_RIGHT
,
DIRECTIONALITY_RIGHT_TO_LEFT
,
DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC
,
DIRECTIONALITY_EUROPEAN_NUMBER
,
DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR
,
DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR
,
DIRECTIONALITY_ARABIC_NUMBER
,
DIRECTIONALITY_COMMON_NUMBER_SEPARATOR
,
DIRECTIONALITY_NONSPACING_MARK
,
DIRECTIONALITY_BOUNDARY_NEUTRAL
,
DIRECTIONALITY_PARAGRAPH_SEPARATOR
,
DIRECTIONALITY_SEGMENT_SEPARATOR
,
DIRECTIONALITY_WHITESPACE
,
DIRECTIONALITY_OTHER_NEUTRALS
,
DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING
,
DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE
,
DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING
,
DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE
,
DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
public static byte getDirectionality(int codePoint)
DIRECTIONALITY_UNDEFINED
.
codePoint
- the character (Unicode code point) for which the directionality property is requested.
DIRECTIONALITY_UNDEFINED
,
DIRECTIONALITY_LEFT_TO_RIGHT
,
DIRECTIONALITY_RIGHT_TO_LEFT
,
DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC
,
DIRECTIONALITY_EUROPEAN_NUMBER
,
DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR
,
DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR
,
DIRECTIONALITY_ARABIC_NUMBER
,
DIRECTIONALITY_COMMON_NUMBER_SEPARATOR
,
DIRECTIONALITY_NONSPACING_MARK
,
DIRECTIONALITY_BOUNDARY_NEUTRAL
,
DIRECTIONALITY_PARAGRAPH_SEPARATOR
,
DIRECTIONALITY_SEGMENT_SEPARATOR
,
DIRECTIONALITY_WHITESPACE
,
DIRECTIONALITY_OTHER_NEUTRALS
,
DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING
,
DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE
,
DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING
,
DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE
,
DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
public static boolean isMirrored(char ch)
'\u0028'
LEFT PARENTHESIS is semantically defined to be an
opening parenthesis. This will appear as a "(" in text that is left-to-right but as a ")" in text that is right-to-left.
Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isMirrored(int)
method.
ch
-
char
for which the mirrored property is requested
true
if the char is mirrored,
false
if the
char
is not mirrored or is not defined.
public static boolean isMirrored(int codePoint)
'\u0028'
LEFT PARENTHESIS is semantically defined to be an
opening parenthesis. This will appear as a "(" in text that is left-to-right but as a ")" in text that is right-to-left.
codePoint
- the character (Unicode code point) to be tested.
true
if the character is mirrored,
false
if the character is not mirrored or is not defined.
public int compareTo(CharacteranotherCharacter)
Character
objects numerically.
compareTo
in interface
Comparable<Character>
anotherCharacter
- the
Character
to be compared.
0
if the argument
Character
is equal to this
Character
; a value less than
0
if this
Character
is numerically less than the
Character
argument; and a value greater than
0
if this
Character
is numerically greater than the
Character
argument (unsigned comparison). Note that this is strictly a numerical comparison; it is not locale-dependent.
public static int compare(char x, char y)
char
values numerically. The value returned is identical to what would be returned by:
Character.valueOf(x).compareTo(Character.valueOf(y))
x
- the first
char
to compare
y
- the second
char
to compare
0
if
x == y
; a value less than
0
if
x < y
; and a value greater than
0
if
x > y
public static char reverseBytes(char ch)
ch
- The
char
of which to reverse the byte order.
public static StringgetName(int codePoint)
codePoint
, or null if the code point is
unassigned
.
Note: if the specified character is not assigned a name by the UnicodeData file (part of the Unicode Character Database maintained by the Unicode Consortium), the returned name is the same as the result of expression.
Character.UnicodeBlock.of(codePoint).toString().replace('_', ' ') + " " + Integer.toHexString(codePoint).toUpperCase(Locale.ENGLISH);
codePoint
- the character (Unicode code point)
IllegalArgumentException
- if the specified
codePoint
is not a valid Unicode code point.