| JavaTM 2 Platform Std. Ed. v1.6.0
java.lang
Class Character
java.lang.Object
 java.lang.Character
- All Implemented Interfaces:
- Serializable, Comparable<Character>
public final class Character - extends Object
- implements Serializable, Comparable<Character>
The 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 4.0.
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
2 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:
- The methods that only accept a
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.
- The methods that accept an
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.
- Since:
- 1.0
- See Also:
- Serialized Form
|
Nested Class Summary |
static class |
Character.Subset
Instances of this class represent particular subsets of the Unicode
character set. |
static class |
Character.UnicodeBlock
A family of character subsets representing the character blocks in the
Unicode specification. |
|
Constructor Summary |
Character(char value)
Constructs a newly allocated Character object that
represents the specified char value. |
|
Method Summary |
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 seq,
int index)
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 seq,
int index)
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 seq,
int beginIndex,
int endIndex)
Returns the number of Unicode code points in the text range of
the specified char sequence. |
int |
compareTo(Character anotherCharacter)
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 obj)
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 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. |
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
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 |
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
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 |
isSurrogatePair(char high,
char low)
Determines whether the specified pair of char
values is a valid 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 in the range of 0x0000 to
0x10FFFF inclusive. |
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 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 seq,
int index,
int codePointOffset)
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. |
MIN_RADIX
public static final int MIN_RADIX
- The minimum radix available for conversion to and from strings.
The constant value of this field is the smallest value permitted
for the radix argument in radix-conversion methods such as the
digit method, the forDigit
method, and the toString method of class
Integer.
- See Also:
digit(char, int),
forDigit(int, int),
Integer.toString(int, int),
Integer.valueOf(java.lang.String),
Constant Field Values
MAX_RADIX
public static final int MAX_RADIX
- The maximum radix available for conversion to and from strings.
The constant value of this field is the largest value permitted
for the radix argument in radix-conversion methods such as the
digit method, the forDigit
method, and the toString method of class
Integer.
- See Also:
digit(char, int),
forDigit(int, int),
Integer.toString(int, int),
Integer.valueOf(java.lang.String),
Constant Field Values
MIN_VALUE
public static final char MIN_VALUE
- The constant value of this field is the smallest value of type
char, '\u0000'.
- Since:
- 1.0.2
- See Also:
- Constant Field Values
MAX_VALUE
public static final char MAX_VALUE
- The constant value of this field is the largest value of type
char, '\uFFFF'.
- Since:
- 1.0.2
- See Also:
- Constant Field Values
TYPE
public static final Class<Character> TYPE
- The
Class instance representing the primitive type
char.
- Since:
- 1.1
UNASSIGNED
public static final byte UNASSIGNED
- General category "Cn" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
UPPERCASE_LETTER
public static final byte UPPERCASE_LETTER
- General category "Lu" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
LOWERCASE_LETTER
public static final byte LOWERCASE_LETTER
- General category "Ll" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
TITLECASE_LETTER
public static final byte TITLECASE_LETTER
- General category "Lt" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
MODIFIER_LETTER
public static final byte MODIFIER_LETTER
- General category "Lm" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
OTHER_LETTER
public static final byte OTHER_LETTER
- General category "Lo" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
NON_SPACING_MARK
public static final byte NON_SPACING_MARK
- General category "Mn" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
ENCLOSING_MARK
public static final byte ENCLOSING_MARK
- General category "Me" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
COMBINING_SPACING_MARK
public static final byte COMBINING_SPACING_MARK
- General category "Mc" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
DECIMAL_DIGIT_NUMBER
public static final byte DECIMAL_DIGIT_NUMBER
- General category "Nd" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
LETTER_NUMBER
public static final byte LETTER_NUMBER
- General category "Nl" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
OTHER_NUMBER
public static final byte OTHER_NUMBER
- General category "No" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
SPACE_SEPARATOR
public static final byte SPACE_SEPARATOR
- General category "Zs" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
LINE_SEPARATOR
public static final byte LINE_SEPARATOR
- General category "Zl" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
PARAGRAPH_SEPARATOR
public static final byte PARAGRAPH_SEPARATOR
- General category "Zp" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
CONTROL
public static final byte CONTROL
- General category "Cc" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
FORMAT
public static final byte FORMAT
- General category "Cf" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
PRIVATE_USE
public static final byte PRIVATE_USE
- General category "Co" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
SURROGATE
public static final byte SURROGATE
- General category "Cs" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
DASH_PUNCTUATION
public static final byte DASH_PUNCTUATION
- General category "Pd" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
START_PUNCTUATION
public static final byte START_PUNCTUATION
- General category "Ps" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
END_PUNCTUATION
public static final byte END_PUNCTUATION
- General category "Pe" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
CONNECTOR_PUNCTUATION
public static final byte CONNECTOR_PUNCTUATION
- General category "Pc" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
OTHER_PUNCTUATION
public static final byte OTHER_PUNCTUATION
- General category "Po" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
MATH_SYMBOL
public static final byte MATH_SYMBOL
- General category "Sm" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
CURRENCY_SYMBOL
public static final byte CURRENCY_SYMBOL
- General category "Sc" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
MODIFIER_SYMBOL
public static final byte MODIFIER_SYMBOL
- General category "Sk" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
OTHER_SYMBOL
public static final byte OTHER_SYMBOL
- General category "So" in the Unicode specification.
- Since:
- 1.1
- See Also:
- Constant Field Values
INITIAL_QUOTE_PUNCTUATION
public static final byte INITIAL_QUOTE_PUNCTUATION
- General category "Pi" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
FINAL_QUOTE_PUNCTUATION
public static final byte FINAL_QUOTE_PUNCTUATION
- General category "Pf" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_UNDEFINED
public static final byte DIRECTIONALITY_UNDEFINED
- Undefined bidirectional character type. Undefined
char
values have undefined directionality in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_LEFT_TO_RIGHT
public static final byte DIRECTIONALITY_LEFT_TO_RIGHT
- Strong bidirectional character type "L" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_RIGHT_TO_LEFT
public static final byte DIRECTIONALITY_RIGHT_TO_LEFT
- Strong bidirectional character type "R" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC
public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC
- Strong bidirectional character type "AL" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_EUROPEAN_NUMBER
public static final byte DIRECTIONALITY_EUROPEAN_NUMBER
- Weak bidirectional character type "EN" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR
public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR
- Weak bidirectional character type "ES" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR
public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR
- Weak bidirectional character type "ET" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_ARABIC_NUMBER
public static final byte DIRECTIONALITY_ARABIC_NUMBER
- Weak bidirectional character type "AN" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_COMMON_NUMBER_SEPARATOR
public static final byte DIRECTIONALITY_COMMON_NUMBER_SEPARATOR
- Weak bidirectional character type "CS" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_NONSPACING_MARK
public static final byte DIRECTIONALITY_NONSPACING_MARK
- Weak bidirectional character type "NSM" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_BOUNDARY_NEUTRAL
public static final byte DIRECTIONALITY_BOUNDARY_NEUTRAL
- Weak bidirectional character type "BN" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_PARAGRAPH_SEPARATOR
public static final byte DIRECTIONALITY_PARAGRAPH_SEPARATOR
- Neutral bidirectional character type "B" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_SEGMENT_SEPARATOR
public static final byte DIRECTIONALITY_SEGMENT_SEPARATOR
- Neutral bidirectional character type "S" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_WHITESPACE
public static final byte DIRECTIONALITY_WHITESPACE
- Neutral bidirectional character type "WS" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_OTHER_NEUTRALS
public static final byte DIRECTIONALITY_OTHER_NEUTRALS
- Neutral bidirectional character type "ON" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING
public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING
- Strong bidirectional character type "LRE" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE
public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE
- Strong bidirectional character type "LRO" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING
public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING
- Strong bidirectional character type "RLE" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE
public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE
- Strong bidirectional character type "RLO" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
public static final byte DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
- Weak bidirectional character type "PDF" in the Unicode specification.
- Since:
- 1.4
- See Also:
- Constant Field Values
MIN_HIGH_SURROGATE
public static final char MIN_HIGH_SURROGATE
- The minimum value of a Unicode high-surrogate code unit in the
UTF-16 encoding. A high-surrogate is also known as a
leading-surrogate.
- Since:
- 1.5
- See Also:
- Constant Field Values
MAX_HIGH_SURROGATE
public static final char MAX_HIGH_SURROGATE
- The maximum value of a Unicode high-surrogate code unit in the
UTF-16 encoding. A high-surrogate is also known as a
leading-surrogate.
- Since:
- 1.5
- See Also:
- Constant Field Values
MIN_LOW_SURROGATE
public static final char MIN_LOW_SURROGATE
- The minimum value of a Unicode low-surrogate code unit in the
UTF-16 encoding. A low-surrogate is also known as a
trailing-surrogate.
- Since:
- 1.5
- See Also:
- Constant Field Values
MAX_LOW_SURROGATE
public static final char MAX_LOW_SURROGATE
- The maximum value of a Unicode low-surrogate code unit in the
UTF-16 encoding. A low-surrogate is also known as a
trailing-surrogate.
- Since:
- 1.5
- See Also:
- Constant Field Values
MIN_SURROGATE
public static final char MIN_SURROGATE
- The minimum value of a Unicode surrogate code unit in the UTF-16 encoding.
- Since:
- 1.5
- See Also:
- Constant Field Values
MAX_SURROGATE
public static final char MAX_SURROGATE
- The maximum value of a Unicode surrogate code unit in the UTF-16 encoding.
- Since:
- 1.5
- See Also:
- Constant Field Values
MIN_SUPPLEMENTARY_CODE_POINT
public static final int MIN_SUPPLEMENTARY_CODE_POINT
- The minimum value of a supplementary code point.
- Since:
- 1.5
- See Also:
- Constant Field Values
MIN_CODE_POINT
public static final int MIN_CODE_POINT
- The minimum value of a Unicode code point.
- Since:
- 1.5
- See Also:
- Constant Field Values
MAX_CODE_POINT
public static final int MAX_CODE_POINT
- The maximum value of a Unicode code point.
- Since:
- 1.5
- See Also:
- Constant Field Values
SIZE
public static final int SIZE
- The number of bits used to represent a char value in unsigned
binary form.
- Since:
- 1.5
- See Also:
- Constant Field Values
Character
public Character(char value)
- Constructs a newly allocated
Character object that
represents the specified char value.
- Parameters:
value - the value to be represented by the
Character object.
valueOf
public static Character valueOf(char c)
- Returns a Character instance representing the specified
char value.
If a new Character instance is not required, this method
should generally be used in preference to the constructor
Character(char), as this method is likely to yield
significantly better space and time performance by caching
frequently requested values.
- Parameters:
c - a char value.
- Returns:
- a Character instance representing c.
- Since:
- 1.5
charValue
public char charValue()
- Returns the value of this
Character object.
- Returns:
- the primitive
char value represented by
this object.
hashCode
public int hashCode()
- Returns a hash code for this
Character.
- Overrides:
hashCode in class Object
- Returns:
- a hash code value for this object.
- See Also:
Object.equals(java.lang.Object),
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