java.lang.Character

All Implemented Interfaces:: Serializable, Comparable<Character>

public final class Character
extends Object
implements Serializable, Comparable<Character>

The wrapper for the primitive type char. This class also provides a number of utility methods for working with characters.

Character data is kept up to date as Unicode evolves. See the Locale data section of the Locale documentation for details of the Unicode versions implemented by current and historical Android releases.

The Unicode specification, character tables, and other information are available at http://www.unicode.org/.

Unicode characters are referred to as code points. The range of valid code points is U+0000 to U+10FFFF. The Basic Multilingual Plane (BMP) is the code point range U+0000 to U+FFFF. Characters above the BMP are referred to as Supplementary Characters. On the Java platform, UTF-16 encoding and char pairs are used to represent code points in the supplementary range. A pair of char values that represent a supplementary character are made up of a high surrogate with a value range of 0xD800 to 0xDBFF and a low surrogate with a value range of 0xDC00 to 0xDFFF.

On the Java platform a char value represents either a single BMP code point or a UTF-16 unit that's part of a surrogate pair. The int type is used to represent all Unicode code points.

Unicode categories

Here's a list of the Unicode character categories and the corresponding Java constant, grouped semantically to provide a convenient overview. This table is also useful in conjunction with \p and \P in regular expressions.

Cn	Unassigned	`UNASSIGNED`
Cc	Control	`CONTROL`
Cf	Format	`FORMAT`
Co	Private use	`PRIVATE_USE`
Cs	Surrogate	`SURROGATE`

Lu	Uppercase letter	`UPPERCASE_LETTER`
Ll	Lowercase letter	`LOWERCASE_LETTER`
Lt	Titlecase letter	`TITLECASE_LETTER`
Lm	Modifier letter	`MODIFIER_LETTER`
Lo	Other letter	`OTHER_LETTER`

Mn	Non-spacing mark	`NON_SPACING_MARK`
Me	Enclosing mark	`ENCLOSING_MARK`
Mc	Combining spacing mark	`COMBINING_SPACING_MARK`

Nd	Decimal digit number	`DECIMAL_DIGIT_NUMBER`
Nl	Letter number	`LETTER_NUMBER`
No	Other number	`OTHER_NUMBER`

Pd	Dash punctuation	`DASH_PUNCTUATION`
Ps	Start punctuation	`START_PUNCTUATION`
Pe	End punctuation	`END_PUNCTUATION`
Pc	Connector punctuation	`CONNECTOR_PUNCTUATION`
Pi	Initial quote punctuation	`INITIAL_QUOTE_PUNCTUATION`
Pf	Final quote punctuation	`FINAL_QUOTE_PUNCTUATION`
Po	Other punctuation	`OTHER_PUNCTUATION`

Sm	Math symbol	`MATH_SYMBOL`
Sc	Currency symbol	`CURRENCY_SYMBOL`
Sk	Modifier symbol	`MODIFIER_SYMBOL`
So	Other symbol	`OTHER_SYMBOL`

Zs	Space separator	`SPACE_SEPARATOR`
Zl	Line separator	`LINE_SEPARATOR`
Zp	Paragraph separator	`PARAGRAPH_SEPARATOR`

Since:: 1.0
See Also:: Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type Class Description

static class Character.Subset

static class Character.UnicodeBlock
Represents a block of Unicode characters.

Field Summary

Fields
Modifier and Type	Field	Description
`static byte`	`COMBINING_SPACING_MARK`	Unicode category constant Mc.
`static byte`	`CONNECTOR_PUNCTUATION`	Unicode category constant Pc.
`static byte`	`CONTROL`	Unicode category constant Cc.
`static byte`	`CURRENCY_SYMBOL`	Unicode category constant Sc.
`static byte`	`DASH_PUNCTUATION`	Unicode category constant Pd.
`static byte`	`DECIMAL_DIGIT_NUMBER`	Unicode category constant Nd.
`static byte`	`DIRECTIONALITY_ARABIC_NUMBER`	Unicode bidirectional constant AN.
`static byte`	`DIRECTIONALITY_BOUNDARY_NEUTRAL`	Unicode bidirectional constant BN.
`static byte`	`DIRECTIONALITY_COMMON_NUMBER_SEPARATOR`	Unicode bidirectional constant CS.
`static byte`	`DIRECTIONALITY_EUROPEAN_NUMBER`	Unicode bidirectional constant EN.
`static byte`	`DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR`	Unicode bidirectional constant ES.
`static byte`	`DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR`	Unicode bidirectional constant ET.
`static byte`	`DIRECTIONALITY_LEFT_TO_RIGHT`	Unicode bidirectional constant L.
`static byte`	`DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING`	Unicode bidirectional constant LRE.
`static byte`	`DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE`	Unicode bidirectional constant LRO.
`static byte`	`DIRECTIONALITY_NONSPACING_MARK`	Unicode bidirectional constant NSM.
`static byte`	`DIRECTIONALITY_OTHER_NEUTRALS`	Unicode bidirectional constant ON.
`static byte`	`DIRECTIONALITY_PARAGRAPH_SEPARATOR`	Unicode bidirectional constant B.
`static byte`	`DIRECTIONALITY_POP_DIRECTIONAL_FORMAT`	Unicode bidirectional constant PDF.
`static byte`	`DIRECTIONALITY_RIGHT_TO_LEFT`	Unicode bidirectional constant R.
`static byte`	`DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC`	Unicode bidirectional constant AL.
`static byte`	`DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING`	Unicode bidirectional constant RLE.
`static byte`	`DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE`	Unicode bidirectional constant RLO.
`static byte`	`DIRECTIONALITY_SEGMENT_SEPARATOR`	Unicode bidirectional constant S.
`static byte`	`DIRECTIONALITY_UNDEFINED`	Unicode bidirectional constant.
`static byte`	`DIRECTIONALITY_WHITESPACE`	Unicode bidirectional constant WS.
`static byte`	`ENCLOSING_MARK`	Unicode category constant Me.
`static byte`	`END_PUNCTUATION`	Unicode category constant Pe.
`static byte`	`FINAL_QUOTE_PUNCTUATION`	Unicode category constant Pf.
`static byte`	`FORMAT`	Unicode category constant Cf.
`static byte`	`INITIAL_QUOTE_PUNCTUATION`	Unicode category constant Pi.
`static byte`	`LETTER_NUMBER`	Unicode category constant Nl.
`static byte`	`LINE_SEPARATOR`	Unicode category constant Zl.
`static byte`	`LOWERCASE_LETTER`	Unicode category constant Ll.
`static byte`	`MATH_SYMBOL`	Unicode category constant Sm.
`static int`	`MAX_CODE_POINT`	The maximum code point value, `U+10FFFF`.
`static char`	`MAX_HIGH_SURROGATE`	The maximum value of a high surrogate or leading surrogate unit in UTF-16 encoding, `'?'`.
`static char`	`MAX_LOW_SURROGATE`	The maximum value of a low surrogate or trailing surrogate unit in UTF-16 encoding, `'?'`.
`static int`	`MAX_RADIX`	The maximum radix used for conversions between characters and integers.
`static char`	`MAX_SURROGATE`	The maximum value of a surrogate unit in UTF-16 encoding, `'?'`.
`static char`	`MAX_VALUE`	The maximum `Character` value.
`static int`	`MIN_CODE_POINT`	The minimum code point value, `U+0000`.
`static char`	`MIN_HIGH_SURROGATE`	The minimum value of a high surrogate or leading surrogate unit in UTF-16 encoding, `'?'`.
`static char`	`MIN_LOW_SURROGATE`	The minimum value of a low surrogate or trailing surrogate unit in UTF-16 encoding, `'?'`.
`static int`	`MIN_RADIX`	The minimum radix used for conversions between characters and integers.
`static int`	`MIN_SUPPLEMENTARY_CODE_POINT`	The minimum value of a supplementary code point, `U+010000`.
`static char`	`MIN_SURROGATE`	The minimum value of a surrogate unit in UTF-16 encoding, `'?'`.
`static char`	`MIN_VALUE`	The minimum `Character` value.
`static byte`	`MODIFIER_LETTER`	Unicode category constant Lm.
`static byte`	`MODIFIER_SYMBOL`	Unicode category constant Sk.
`static byte`	`NON_SPACING_MARK`	Unicode category constant Mn.
`static byte`	`OTHER_LETTER`	Unicode category constant Lo.
`static byte`	`OTHER_NUMBER`	Unicode category constant No.
`static byte`	`OTHER_PUNCTUATION`	Unicode category constant Po.
`static byte`	`OTHER_SYMBOL`	Unicode category constant So.
`static byte`	`PARAGRAPH_SEPARATOR`	Unicode category constant Zp.
`static byte`	`PRIVATE_USE`	Unicode category constant Co.
`static int`	`SIZE`	The number of bits required to represent a `Character` value unsigned form.
`static byte`	`SPACE_SEPARATOR`	Unicode category constant Zs.
`static byte`	`START_PUNCTUATION`	Unicode category constant Ps.
`static byte`	`SURROGATE`	Unicode category constant Cs.
`static byte`	`TITLECASE_LETTER`	Unicode category constant Lt.
`static Class<Character>`	`TYPE`	The `Class` object that represents the primitive type `char`.
`static byte`	`UNASSIGNED`	Unicode category constant Cn.
`static byte`	`UPPERCASE_LETTER`	Unicode category constant Lu.

Constructor Summary

Constructors

Constructor Description

Character(char value)
Constructs a new Character with the specified primitive char value.

Method Summary

Modifier and Type	Method	Description
`static int`	`charCount(int codePoint)`	Calculates the number of `char` values required to represent the specified Unicode code point.
`char`	`charValue()`	Gets the primitive value of this character.
`static int`	`codePointAt(char[] seq, int index)`	Returns the code point at `index` in the specified array of character units.
`static int`	`codePointAt(char[] seq, int index, int limit)`	Returns the code point at `index` in the specified array of character units, where `index` has to be less than `limit`.
`static int`	`codePointAt(CharSequence seq, int index)`	Returns the code point at `index` in the specified sequence of character units.
`static int`	`codePointBefore(char[] seq, int index)`	Returns the code point that precedes `index` in the specified array of character units.
`static int`	`codePointBefore(char[] seq, int index, int start)`	Returns the code point that precedes the `index` in the specified array of character units and is not less than `start`.
`static int`	`codePointBefore(CharSequence seq, int index)`	Returns the code point that precedes `index` in the specified sequence of character units.
`static int`	`codePointCount(char[] seq, int offset, int count)`	Counts the number of Unicode code points in the subsequence of the specified char array, as delineated by `offset` and `count`.
`static int`	`codePointCount(CharSequence seq, int beginIndex, int endIndex)`	Counts the number of Unicode code points in the subsequence of the specified character sequence, as delineated by `beginIndex` and `endIndex`.
`static int`	`compare(char lhs, char rhs)`	Compares two `char` values.
`int`	`compareTo(Character c)`	Compares this object to the specified character object to determine their relative order.
`static int`	`digit(char c, int radix)`	Convenience method to determine the value of the specified character `c` in the supplied radix.
`static int`	`digit(int codePoint, int radix)`	Convenience method to determine the value of the character `codePoint` in the supplied radix.
`boolean`	`equals(Object object)`	Compares this object with the specified object and indicates if they are equal.
`static char`	`forDigit(int digit, int radix)`	Returns the character which represents the specified digit in the specified radix.
`static byte`	`getDirectionality(char c)`	Gets the Unicode directionality of the specified character.
`static byte`	`getDirectionality(int codePoint)`	Gets the Unicode directionality of the specified character.
`static String`	`getName(int codePoint)`	Returns a human-readable name for the given code point, or null if the code point is unassigned.
`static int`	`getNumericValue(char c)`	Returns the numeric value of the specified Unicode character.
`static int`	`getNumericValue(int codePoint)`	Gets the numeric value of the specified Unicode code point.
`static int`	`getType(char c)`	Gets the general Unicode category of the specified character.
`static int`	`getType(int codePoint)`	Gets the general Unicode category of the specified code point.
`int`	`hashCode()`	Returns an integer hash code for this object.
`static char`	`highSurrogate(int codePoint)`	Returns the high surrogate for the given code point.
`static boolean`	`isAlphabetic(int codePoint)`	Returns true if the given code point is alphabetic.
`static boolean`	`isBmpCodePoint(int codePoint)`	Returns true if the given code point is in the Basic Multilingual Plane (BMP).
`static boolean`	`isDefined(char c)`	Indicates whether the specified character is defined in the Unicode specification.
`static boolean`	`isDefined(int codePoint)`	Indicates whether the specified code point is defined in the Unicode specification.
`static boolean`	`isDigit(char c)`	Indicates whether the specified character is a digit.
`static boolean`	`isDigit(int codePoint)`	Indicates whether the specified code point is a digit.
`static boolean`	`isHighSurrogate(char ch)`	Indicates whether `ch` is a high- (or leading-) surrogate code unit that is used for representing supplementary characters in UTF-16 encoding.
`static boolean`	`isIdentifierIgnorable(char c)`	Indicates whether the specified character is ignorable in a Java or Unicode identifier.
`static boolean`	`isIdentifierIgnorable(int codePoint)`	Indicates whether the specified code point is ignorable in a Java or Unicode identifier.
`static boolean`	`isIdeographic(int codePoint)`	Returns true if the given code point is a CJKV ideographic character.
`static boolean`	`isISOControl(char c)`	Indicates whether the specified character is an ISO control character.
`static boolean`	`isISOControl(int c)`	Indicates whether the specified code point is an ISO control character.
`static boolean`	`isJavaIdentifierPart(char c)`	Indicates whether the specified character is a valid part of a Java identifier other than the first character.
`static boolean`	`isJavaIdentifierPart(int codePoint)`	Indicates whether the specified code point is a valid part of a Java identifier other than the first character.
`static boolean`	`isJavaIdentifierStart(char c)`	Indicates whether the specified character is a valid first character for a Java identifier.
`static boolean`	`isJavaIdentifierStart(int codePoint)`	Indicates whether the specified code point is a valid first character for a Java identifier.
`static boolean`	`isJavaLetter(char c)`	Deprecated. Use `isJavaIdentifierStart(char)` instead.
`static boolean`	`isJavaLetterOrDigit(char c)`	Deprecated. Use `isJavaIdentifierPart(char)` instead.
`static boolean`	`isLetter(char c)`	Indicates whether the specified character is a letter.
`static boolean`	`isLetter(int codePoint)`	Indicates whether the specified code point is a letter.
`static boolean`	`isLetterOrDigit(char c)`	Indicates whether the specified character is a letter or a digit.
`static boolean`	`isLetterOrDigit(int codePoint)`	Indicates whether the specified code point is a letter or a digit.
`static boolean`	`isLowerCase(char c)`	Indicates whether the specified character is a lower case letter.
`static boolean`	`isLowerCase(int codePoint)`	Indicates whether the specified code point is a lower case letter.
`static boolean`	`isLowSurrogate(char ch)`	Indicates whether `ch` is a low- (or trailing-) surrogate code unit that is used for representing supplementary characters in UTF-16 encoding.
`static boolean`	`isMirrored(char c)`	Indicates whether the specified character is mirrored.
`static boolean`	`isMirrored(int codePoint)`	Indicates whether the specified code point is mirrored.
`static boolean`	`isSpace(char c)`	Deprecated. Use `isWhitespace(char)` instead.
`static boolean`	`isSpaceChar(char c)`	See `isSpaceChar(int)`.
`static boolean`	`isSpaceChar(int codePoint)`	Returns true if the given code point is a Unicode space character.
`static boolean`	`isSupplementaryCodePoint(int codePoint)`	Indicates whether `codePoint` is within the supplementary code point range.
`static boolean`	`isSurrogate(char ch)`	Returns true if the given character is a high or low surrogate.
`static boolean`	`isSurrogatePair(char high, char low)`	Indicates whether the specified character pair is a valid surrogate pair.
`static boolean`	`isTitleCase(char c)`	Indicates whether the specified character is a titlecase character.
`static boolean`	`isTitleCase(int codePoint)`	Indicates whether the specified code point is a titlecase character.
`static boolean`	`isUnicodeIdentifierPart(char c)`	Indicates whether the specified character is valid as part of a Unicode identifier other than the first character.
`static boolean`	`isUnicodeIdentifierPart(int codePoint)`	Indicates whether the specified code point is valid as part of a Unicode identifier other than the first character.
`static boolean`	`isUnicodeIdentifierStart(char c)`	Indicates whether the specified character is a valid initial character for a Unicode identifier.
`static boolean`	`isUnicodeIdentifierStart(int codePoint)`	Indicates whether the specified code point is a valid initial character for a Unicode identifier.
`static boolean`	`isUpperCase(char c)`	Indicates whether the specified character is an upper case letter.
`static boolean`	`isUpperCase(int codePoint)`	Indicates whether the specified code point is an upper case letter.
`static boolean`	`isValidCodePoint(int codePoint)`	Indicates whether `codePoint` is a valid Unicode code point.
`static boolean`	`isWhitespace(char c)`	See `isWhitespace(int)`.
`static boolean`	`isWhitespace(int codePoint)`	Returns true if the given code point is a Unicode whitespace character.
`static char`	`lowSurrogate(int codePoint)`	Returns the low surrogate for the given code point.
`static int`	`offsetByCodePoints(char[] seq, int start, int count, int index, int codePointOffset)`	Determines the index in a subsequence of the specified character array that is offset `codePointOffset` code points from `index`.
`static int`	`offsetByCodePoints(CharSequence seq, int index, int codePointOffset)`	Determines the index in the specified character sequence that is offset `codePointOffset` code points from `index`.
`static char`	`reverseBytes(char c)`	Reverses the order of the first and second byte in the specified character.
`static char[]`	`toChars(int codePoint)`	Converts the specified Unicode code point into a UTF-16 encoded sequence and returns it as a char array.
`static int`	`toChars(int codePoint, char[] dst, int dstIndex)`	Converts the specified Unicode code point into a UTF-16 encoded sequence and copies the value(s) into the char array `dst`, starting at index `dstIndex`.
`static int`	`toCodePoint(char high, char low)`	Converts a surrogate pair into a Unicode code point.
`static char`	`toLowerCase(char c)`	Returns the lower case equivalent for the specified character if the character is an upper case letter.
`static int`	`toLowerCase(int codePoint)`	Returns the lower case equivalent for the specified code point if it is an upper case letter.
`String`	`toString()`	Returns a string containing a concise, human-readable description of this object.
`static String`	`toString(char value)`	Converts the specified character to its string representation.
`static char`	`toTitleCase(char c)`	Returns the title case equivalent for the specified character if it exists.
`static int`	`toTitleCase(int codePoint)`	Returns the title case equivalent for the specified code point if it exists.
`static char`	`toUpperCase(char c)`	Returns the upper case equivalent for the specified character if the character is a lower case letter.
`static int`	`toUpperCase(int codePoint)`	Returns the upper case equivalent for the specified code point if the code point is a lower case letter.
`static Character`	`valueOf(char c)`	Returns a `Character` instance for the `char` value passed.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details
- MIN_VALUE
  
  public static final char MIN_VALUE
  
  The minimum Character value.
  
  See Also:
  
  Constant Field Values
- MAX_VALUE
  
  public static final char MAX_VALUE
  
  The maximum Character value.
  
  See Also:
  
  Constant Field Values
- MIN_RADIX
  
  public static final int MIN_RADIX
  
  The minimum radix used for conversions between characters and integers.
  
  See Also:
  
  Constant Field Values
- MAX_RADIX
  
  public static final int MAX_RADIX
  
  The maximum radix used for conversions between characters and integers.
  
  See Also:
  
  Constant Field Values
- TYPE
  
  public static final Class<Character> TYPE
  
  The Class object that represents the primitive type char.
- UNASSIGNED
  
  public static final byte UNASSIGNED
  
  Unicode category constant Cn.
  
  See Also:
  
  Constant Field Values
- UPPERCASE_LETTER
  
  public static final byte UPPERCASE_LETTER
  
  Unicode category constant Lu.
  
  See Also:
  
  Constant Field Values
- LOWERCASE_LETTER
  
  public static final byte LOWERCASE_LETTER
  
  Unicode category constant Ll.
  
  See Also:
  
  Constant Field Values
- TITLECASE_LETTER
  
  public static final byte TITLECASE_LETTER
  
  Unicode category constant Lt.
  
  See Also:
  
  Constant Field Values
- MODIFIER_LETTER
  
  public static final byte MODIFIER_LETTER
  
  Unicode category constant Lm.
  
  See Also:
  
  Constant Field Values
- OTHER_LETTER
  
  public static final byte OTHER_LETTER
  
  Unicode category constant Lo.
  
  See Also:
  
  Constant Field Values
- NON_SPACING_MARK
  
  public static final byte NON_SPACING_MARK
  
  Unicode category constant Mn.
  
  See Also:
  
  Constant Field Values
- ENCLOSING_MARK
  
  public static final byte ENCLOSING_MARK
  
  Unicode category constant Me.
  
  See Also:
  
  Constant Field Values
- COMBINING_SPACING_MARK
  
  public static final byte COMBINING_SPACING_MARK
  
  Unicode category constant Mc.
  
  See Also:
  
  Constant Field Values
- DECIMAL_DIGIT_NUMBER
  
  public static final byte DECIMAL_DIGIT_NUMBER
  
  Unicode category constant Nd.
  
  See Also:
  
  Constant Field Values
- LETTER_NUMBER
  
  public static final byte LETTER_NUMBER
  
  Unicode category constant Nl.
  
  See Also:
  
  Constant Field Values
- OTHER_NUMBER
  
  public static final byte OTHER_NUMBER
  
  Unicode category constant No.
  
  See Also:
  
  Constant Field Values
- SPACE_SEPARATOR
  
  public static final byte SPACE_SEPARATOR
  
  Unicode category constant Zs.
  
  See Also:
  
  Constant Field Values
- LINE_SEPARATOR
  
  public static final byte LINE_SEPARATOR
  
  Unicode category constant Zl.
  
  See Also:
  
  Constant Field Values
- PARAGRAPH_SEPARATOR
  
  public static final byte PARAGRAPH_SEPARATOR
  
  Unicode category constant Zp.
  
  See Also:
  
  Constant Field Values
- CONTROL
  
  public static final byte CONTROL
  
  Unicode category constant Cc.
  
  See Also:
  
  Constant Field Values
- FORMAT
  
  public static final byte FORMAT
  
  Unicode category constant Cf.
  
  See Also:
  
  Constant Field Values
- PRIVATE_USE
  
  public static final byte PRIVATE_USE
  
  Unicode category constant Co.
  
  See Also:
  
  Constant Field Values
- SURROGATE
  
  public static final byte SURROGATE
  
  Unicode category constant Cs.
  
  See Also:
  
  Constant Field Values
- DASH_PUNCTUATION
  
  public static final byte DASH_PUNCTUATION
  
  Unicode category constant Pd.
  
  See Also:
  
  Constant Field Values
- START_PUNCTUATION
  
  public static final byte START_PUNCTUATION
  
  Unicode category constant Ps.
  
  See Also:
  
  Constant Field Values
- END_PUNCTUATION
  
  public static final byte END_PUNCTUATION
  
  Unicode category constant Pe.
  
  See Also:
  
  Constant Field Values
- CONNECTOR_PUNCTUATION
  
  public static final byte CONNECTOR_PUNCTUATION
  
  Unicode category constant Pc.
  
  See Also:
  
  Constant Field Values
- OTHER_PUNCTUATION
  
  public static final byte OTHER_PUNCTUATION
  
  Unicode category constant Po.
  
  See Also:
  
  Constant Field Values
- MATH_SYMBOL
  
  public static final byte MATH_SYMBOL
  
  Unicode category constant Sm.
  
  See Also:
  
  Constant Field Values
- CURRENCY_SYMBOL
  
  public static final byte CURRENCY_SYMBOL
  
  Unicode category constant Sc.
  
  See Also:
  
  Constant Field Values
- MODIFIER_SYMBOL
  
  public static final byte MODIFIER_SYMBOL
  
  Unicode category constant Sk.
  
  See Also:
  
  Constant Field Values
- OTHER_SYMBOL
  
  public static final byte OTHER_SYMBOL
  
  Unicode category constant So.
  
  See Also:
  
  Constant Field Values
- INITIAL_QUOTE_PUNCTUATION
  
  public static final byte INITIAL_QUOTE_PUNCTUATION
  
  Unicode category constant Pi.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- FINAL_QUOTE_PUNCTUATION
  
  public static final byte FINAL_QUOTE_PUNCTUATION
  
  Unicode category constant Pf.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_UNDEFINED
  
  public static final byte DIRECTIONALITY_UNDEFINED
  
  Unicode bidirectional constant.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_LEFT_TO_RIGHT
  
  public static final byte DIRECTIONALITY_LEFT_TO_RIGHT
  
  Unicode bidirectional constant L.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_RIGHT_TO_LEFT
  
  public static final byte DIRECTIONALITY_RIGHT_TO_LEFT
  
  Unicode bidirectional constant R.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC
  
  public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC
  
  Unicode bidirectional constant AL.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_EUROPEAN_NUMBER
  
  public static final byte DIRECTIONALITY_EUROPEAN_NUMBER
  
  Unicode bidirectional constant EN.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR
  
  public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR
  
  Unicode bidirectional constant ES.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR
  
  public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR
  
  Unicode bidirectional constant ET.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_ARABIC_NUMBER
  
  public static final byte DIRECTIONALITY_ARABIC_NUMBER
  
  Unicode bidirectional constant AN.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_COMMON_NUMBER_SEPARATOR
  
  public static final byte DIRECTIONALITY_COMMON_NUMBER_SEPARATOR
  
  Unicode bidirectional constant CS.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_NONSPACING_MARK
  
  public static final byte DIRECTIONALITY_NONSPACING_MARK
  
  Unicode bidirectional constant NSM.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_BOUNDARY_NEUTRAL
  
  public static final byte DIRECTIONALITY_BOUNDARY_NEUTRAL
  
  Unicode bidirectional constant BN.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_PARAGRAPH_SEPARATOR
  
  public static final byte DIRECTIONALITY_PARAGRAPH_SEPARATOR
  
  Unicode bidirectional constant B.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_SEGMENT_SEPARATOR
  
  public static final byte DIRECTIONALITY_SEGMENT_SEPARATOR
  
  Unicode bidirectional constant S.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_WHITESPACE
  
  public static final byte DIRECTIONALITY_WHITESPACE
  
  Unicode bidirectional constant WS.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_OTHER_NEUTRALS
  
  public static final byte DIRECTIONALITY_OTHER_NEUTRALS
  
  Unicode bidirectional constant ON.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING
  
  public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING
  
  Unicode bidirectional constant LRE.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE
  
  public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE
  
  Unicode bidirectional constant LRO.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING
  
  public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING
  
  Unicode bidirectional constant RLE.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE
  
  public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE
  
  Unicode bidirectional constant RLO.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
  
  public static final byte DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
  
  Unicode bidirectional constant PDF.
  
  Since:
  
  1.4
  
  See Also:
  
  Constant Field Values
- MIN_HIGH_SURROGATE
  
  public static final char MIN_HIGH_SURROGATE
  
  The minimum value of a high surrogate or leading surrogate unit in UTF-16 encoding, '?'.
  
  Since:
  
  1.5
  
  See Also:
  
  Constant Field Values
- MAX_HIGH_SURROGATE
  
  public static final char MAX_HIGH_SURROGATE
  
  The maximum value of a high surrogate or leading surrogate unit in UTF-16 encoding, '?'.
  
  Since:
  
  1.5
  
  See Also:
  
  Constant Field Values
- MIN_LOW_SURROGATE
  
  public static final char MIN_LOW_SURROGATE
  
  The minimum value of a low surrogate or trailing surrogate unit in UTF-16 encoding, '?'.
  
  Since:
  
  1.5
  
  See Also:
  
  Constant Field Values
- MAX_LOW_SURROGATE
  
  public static final char MAX_LOW_SURROGATE
  
  The maximum value of a low surrogate or trailing surrogate unit in UTF-16 encoding, '?'.
  
  Since:
  
  1.5
  
  See Also:
  
  Constant Field Values
- MIN_SURROGATE
  
  public static final char MIN_SURROGATE
  
  The minimum value of a surrogate unit in UTF-16 encoding, '?'.
  
  Since:
  
  1.5
  
  See Also:
  
  Constant Field Values
- MAX_SURROGATE
  
  public static final char MAX_SURROGATE
  
  The maximum value of a surrogate unit in 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, U+010000.
  
  Since:
  
  1.5
  
  See Also:
  
  Constant Field Values
- MIN_CODE_POINT
  
  public static final int MIN_CODE_POINT
  
  The minimum code point value, U+0000.
  
  Since:
  
  1.5
  
  See Also:
  
  Constant Field Values
- MAX_CODE_POINT
  
  public static final int MAX_CODE_POINT
  
  The maximum code point value, U+10FFFF.
  
  Since:
  
  1.5
  
  See Also:
  
  Constant Field Values
- SIZE
  
  public static final int SIZE
  
  The number of bits required to represent a Character value unsigned form.
  
  Since:
  
  1.5
  
  See Also:
  
  Constant Field Values
Constructor Details
- Character
  
  public Character(char value)
  
  Constructs a new Character with the specified primitive char value.
  
  Parameters:
  
  value - the primitive char value to store in the new instance.
Method Details
- charValue
  
  public char charValue()
  
  Gets the primitive value of this character.
  
  Returns:
  
  this object's primitive value.
- compareTo
  
  public int compareTo(Character c)
  
  Compares this object to the specified character object to determine their relative order.
  
  Specified by:
  
  compareTo in interface Comparable<Character>
  
  Parameters:
  
  c - the character object to compare this object to.
  
  Returns:
  
  0 if the value of this character and the value of c are equal; a positive value if the value of this character is greater than the value of c; a negative value if the value of this character is less than the value of c.
  
  Since:
  
  1.2
  
  See Also:
  
  Comparable
- compare
  
  public static int compare(char lhs, char rhs)
  
  Compares two char values.
  
  Returns:
  
  0 if lhs = rhs, less than 0 if lhs < rhs, and greater than 0 if lhs > rhs.
  
  Since:
  
  1.7
- valueOf
  
  public static Character valueOf(char c)
  
  Returns a Character instance for the char value passed.
  If it is not necessary to get a new Character instance, it is recommended to use this method instead of the constructor, since it maintains a cache of instances which may result in better performance.
  
  Parameters:
  
  c - the char value for which to get a Character instance.
  
  Returns:
  
  the Character instance for c.
  
  Since:
  
  1.5
- isValidCodePoint
  
  public static boolean isValidCodePoint(int codePoint)
  
  Indicates whether codePoint is a valid Unicode code point.
  
  Parameters:
  
  codePoint - the code point to test.
  
  Returns:
  
  true if codePoint is a valid Unicode code point; false otherwise.
  
  Since:
  
  1.5
- isSupplementaryCodePoint
  
  public static boolean isSupplementaryCodePoint(int codePoint)
  
  Indicates whether codePoint is within the supplementary code point range.
  
  Parameters:
  
  codePoint - the code point to test.
  
  Returns:
  
  true if codePoint is within the supplementary code point range; false otherwise.
  
  Since:
  
  1.5
- isHighSurrogate
  
  public static boolean isHighSurrogate(char ch)
  
  Indicates whether ch is a high- (or leading-) surrogate code unit that is used for representing supplementary characters in UTF-16 encoding.
  
  Parameters:
  
  ch - the character to test.
  
  Returns:
  
  true if ch is a high-surrogate code unit; false otherwise.
  
  Since:
  
  1.5
  
  See Also:
  
  isLowSurrogate(char)
- isLowSurrogate
  
  public static boolean isLowSurrogate(char ch)
  
  Indicates whether ch is a low- (or trailing-) surrogate code unit that is used for representing supplementary characters in UTF-16 encoding.
  
  Parameters:
  
  ch - the character to test.
  
  Returns:
  
  true if ch is a low-surrogate code unit; false otherwise.
  
  Since:
  
  1.5
  
  See Also:
  
  isHighSurrogate(char)
- isSurrogate
  
  public static boolean isSurrogate(char ch)
  
  Returns true if the given character is a high or low surrogate.
  
  Since:
  
  1.7
- isSurrogatePair
  
  public static boolean isSurrogatePair(char high, char low)
  
  Indicates whether the specified character pair is a valid surrogate pair.
  
  Parameters:
  
  high - the high surrogate unit to test.
  
  low - the low surrogate unit to test.
  
  Returns:
  
  true if high is a high-surrogate code unit and low is a low-surrogate code unit; false otherwise.
  
  Since:
  
  1.5
  
  See Also:
  
  isHighSurrogate(char), isLowSurrogate(char)
- charCount
  
  public static int charCount(int codePoint)
  
  Calculates the number of char values required to represent the specified Unicode code point. This method checks if the codePoint is greater than or equal to 0x10000, in which case 2 is returned, otherwise 1. To test if the code point is valid, use the isValidCodePoint(int) method.
  
  Parameters:
  
  codePoint - the code point for which to calculate the number of required chars.
  
  Returns:
  
  2 if codePoint >= 0x10000; 1 otherwise.
  
  Since:
  
  1.5
  
  See Also:
  
  isValidCodePoint(int), isSupplementaryCodePoint(int)
- toCodePoint
  
  public static int toCodePoint(char high, char low)
  
  Converts a surrogate pair into a Unicode code point. This method assumes that the pair are valid surrogates. If the pair are not valid surrogates, then the result is indeterminate. The isSurrogatePair(char, char) method should be used prior to this method to validate the pair.
  
  Parameters:
  
  high - the high surrogate unit.
  
  low - the low surrogate unit.
  
  Returns:
  
  the Unicode code point corresponding to the surrogate unit pair.
  
  Since:
  
  1.5
  
  See Also:
  
  isSurrogatePair(char, char)
- codePointAt
  
  public static int codePointAt(CharSequence seq, int index)
  
  Returns the code point at index in the specified sequence of character units. If the unit at index is a high-surrogate unit, index + 1 is less than the length of the sequence and the unit at index + 1 is a low-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index is returned.
  
  Parameters:
  
  seq - the source sequence of char units.
  
  index - the position in seq from which to retrieve the code point.
  
  Returns:
  
  the Unicode code point or char value at index in seq.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if the index is negative or greater than or equal to the length of seq.
  
  Since:
  
  1.5
- codePointAt
  
  public static int codePointAt(char[] seq, int index)
  
  Returns the code point at index in the specified array of character units. If the unit at index is a high-surrogate unit, index + 1 is less than the length of the array and the unit at index + 1 is a low-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index is returned.
  
  Parameters:
  
  seq - the source array of char units.
  
  index - the position in seq from which to retrieve the code point.
  
  Returns:
  
  the Unicode code point or char value at index in seq.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if the index is negative or greater than or equal to the length of seq.
  
  Since:
  
  1.5
- codePointAt
  
  public static int codePointAt(char[] seq, int index, int limit)
  
  Returns the code point at index in the specified array of character units, where index has to be less than limit. If the unit at index is a high-surrogate unit, index + 1 is less than limit and the unit at index + 1 is a low-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index is returned.
  
  Parameters:
  
  seq - the source array of char units.
  
  index - the position in seq from which to get the code point.
  
  limit - the index after the last unit in seq that can be used.
  
  Returns:
  
  the Unicode code point or char value at index in seq.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if index < 0, index >= limit, limit < 0 or if limit is greater than the length of seq.
  
  Since:
  
  1.5
- codePointBefore
  
  public static int codePointBefore(CharSequence seq, int index)
  
  Returns the code point that precedes index in the specified sequence of character units. If the unit at index - 1 is a low-surrogate unit, index - 2 is not negative and the unit at index - 2 is a high-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index - 1 is returned.
  
  Parameters:
  
  seq - the source sequence of char units.
  
  index - the position in seq following the code point that should be returned.
  
  Returns:
  
  the Unicode code point or char value before index in seq.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if the index is less than 1 or greater than the length of seq.
  
  Since:
  
  1.5
- codePointBefore
  
  public static int codePointBefore(char[] seq, int index)
  
  Returns the code point that precedes index in the specified array of character units. If the unit at index - 1 is a low-surrogate unit, index - 2 is not negative and the unit at index - 2 is a high-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index - 1 is returned.
  
  Parameters:
  
  seq - the source array of char units.
  
  index - the position in seq following the code point that should be returned.
  
  Returns:
  
  the Unicode code point or char value before index in seq.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if the index is less than 1 or greater than the length of seq.
  
  Since:
  
  1.5
- codePointBefore
  
  public static int codePointBefore(char[] seq, int index, int start)
  
  Returns the code point that precedes the index in the specified array of character units and is not less than start. If the unit at index - 1 is a low-surrogate unit, index - 2 is not less than start and the unit at index - 2 is a high-surrogate unit, then the supplementary code point represented by the pair is returned; otherwise the char value at index - 1 is returned.
  
  Parameters:
  
  seq - the source array of char units.
  
  index - the position in seq following the code point that should be returned.
  
  start - the index of the first element in seq.
  
  Returns:
  
  the Unicode code point or char value before index in seq.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if the index <= start, start < 0, index is greater than the length of seq, or if start is equal or greater than the length of seq.
  
  Since:
  
  1.5
- toChars
  
  public static int toChars(int codePoint, char[] dst, int dstIndex)
  
  Converts the specified Unicode code point into a UTF-16 encoded sequence and copies the value(s) into the char array dst, starting at index dstIndex.
  
  Parameters:
  
  codePoint - the Unicode code point to encode.
  
  dst - the destination array to copy the encoded value into.
  
  dstIndex - the index in dst from where to start copying.
  
  Returns:
  
  the number of char value units copied into dst.
  
  Throws:
  
  IllegalArgumentException - if codePoint is not a valid code point.
  
  NullPointerException - if dst is null.
  
  IndexOutOfBoundsException - if dstIndex is negative, greater than or equal to dst.length or equals dst.length - 1 when codePoint is a supplementary code point.
  
  Since:
  
  1.5
- toChars
  
  public static char[] toChars(int codePoint)
  
  Converts the specified Unicode code point into a UTF-16 encoded sequence and returns it as a char array.
  
  Parameters:
  
  codePoint - the Unicode code point to encode.
  
  Returns:
  
  the UTF-16 encoded char sequence. If codePoint is a supplementary code point, then the returned array contains two characters, otherwise it contains just one character.
  
  Throws:
  
  IllegalArgumentException - if codePoint is not a valid code point.
  
  Since:
  
  1.5
- codePointCount
  
  public static int codePointCount(CharSequence seq, int beginIndex, int endIndex)
  
  Counts the number of Unicode code points in the subsequence of the specified character sequence, as delineated by beginIndex and endIndex. Any surrogate values with missing pair values will be counted as one code point.
  
  Parameters:
  
  seq - the CharSequence to look through.
  
  beginIndex - the inclusive index to begin counting at.
  
  endIndex - the exclusive index to stop counting at.
  
  Returns:
  
  the number of Unicode code points.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if beginIndex < 0, beginIndex > endIndex or if endIndex is greater than the length of seq.
  
  Since:
  
  1.5
- codePointCount
  
  public static int codePointCount(char[] seq, int offset, int count)
  
  Counts the number of Unicode code points in the subsequence of the specified char array, as delineated by offset and count. Any surrogate values with missing pair values will be counted as one code point.
  
  Parameters:
  
  seq - the char array to look through
  
  offset - the inclusive index to begin counting at.
  
  count - the number of char values to look through in seq.
  
  Returns:
  
  the number of Unicode code points.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if offset < 0, count < 0 or if offset + count is greater than the length of seq.
  
  Since:
  
  1.5
- offsetByCodePoints
  
  public static int offsetByCodePoints(CharSequence seq, int index, int codePointOffset)
  
  Determines the index in the specified character sequence that is offset codePointOffset code points from index.
  
  Parameters:
  
  seq - the character sequence to find the index in.
  
  index - the start index in seq.
  
  codePointOffset - the number of code points to look backwards or forwards; may be a negative or positive value.
  
  Returns:
  
  the index in seq that is codePointOffset code points away from index.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if index < 0, index is greater than the length of seq, or if there are not enough values in seq to skip codePointOffset code points forwards or backwards (if codePointOffset is negative) from index.
  
  Since:
  
  1.5
- offsetByCodePoints
  
  public static int offsetByCodePoints(char[] seq, int start, int count, int index, int codePointOffset)
  
  Determines the index in a subsequence of the specified character array that is offset codePointOffset code points from index. The subsequence is delineated by start and count.
  
  Parameters:
  
  seq - the character array to find the index in.
  
  start - the inclusive index that marks the beginning of the subsequence.
  
  count - the number of char values to include within the subsequence.
  
  index - the start index in the subsequence of the char array.
  
  codePointOffset - the number of code points to look backwards or forwards; may be a negative or positive value.
  
  Returns:
  
  the index in seq that is codePointOffset code points away from index.
  
  Throws:
  
  NullPointerException - if seq is null.
  
  IndexOutOfBoundsException - if start < 0, count < 0, index < start, index > start + count, start + count is greater than the length of seq, or if there are not enough values in seq to skip codePointOffset code points forward or backward (if codePointOffset is negative) from index.
  
  Since:
  
  1.5
- digit
  
  public static int digit(char c, int radix)
  
  Convenience method to determine the value of the specified character c in the supplied radix. The value of radix must be between MIN_RADIX and MAX_RADIX.
  
  Parameters:
  
  c - the character to determine the value of.
  
  radix - the radix.
  
  Returns:
  
  the value of c in radix if radix lies between MIN_RADIX and MAX_RADIX; -1 otherwise.
- digit
  
  public static int digit(int codePoint, int radix)
  
  Convenience method to determine the value of the character codePoint in the supplied radix. The value of radix must be between MIN_RADIX and MAX_RADIX.
  
  Parameters:
  
  codePoint - the character, including supplementary characters.
  
  radix - the radix.
  
  Returns:
  
  if radix lies between MIN_RADIX and MAX_RADIX then the value of the character in the radix; -1 otherwise.
- equals
  
  public boolean equals(Object object)
  
  Compares this object with the specified object and indicates if they are equal. In order to be equal, object must be an instance of Character and have the same char value as this object.
  
  Overrides:
  
  equals in class Object
  
  Parameters:
  
  object - the object to compare this double with.
  
  Returns:
  
  true if the specified object is equal to this Character; false otherwise.
  
  See Also:
  
  Object.hashCode()
- forDigit
  
  public static char forDigit(int digit, int radix)
  
  Returns the character which represents the specified digit in the specified radix. The radix must be between MIN_RADIX and MAX_RADIX inclusive; digit must not be negative and smaller than radix. If any of these conditions does not hold, 0 is returned.
  
  Parameters:
  
  digit - the integer value.
  
  radix - the radix.
  
  Returns:
  
  the character which represents the digit in the radix.
- getName
  
  public static String getName(int codePoint)
  Returns a human-readable name for the given code point, or null if the code point is unassigned.
  As a fallback mechanism this method returns strings consisting of the Unicode block name (with underscores replaced by spaces), a single space, and the uppercase hex value of the code point, using as few digits as necessary.
  Examples:
  
  Character.getName(0) returns "NULL".
  Character.getName('e') returns "LATIN SMALL LETTER E".
  Character.getName('٦') returns "ARABIC-INDIC DIGIT SIX".
  Character.getName(0xe000) returns "PRIVATE USE AREA E000".
  
  Note that the exact strings returned will vary from release to release.
  Throws:
  
  IllegalArgumentException - if codePoint is not a valid code point.
  
  Since:
  
  1.7
- getNumericValue
  
  public static int getNumericValue(char c)
  
  Returns the numeric value of the specified Unicode character. See getNumericValue(int).
  
  Parameters:
  
  c - the character
  
  Returns:
  
  a non-negative numeric integer value if a numeric value for c exists, -1 if there is no numeric value for c, -2 if the numeric value can not be represented as an integer.
- getNumericValue
  
  public static int getNumericValue(int codePoint)
  
  Gets the numeric value of the specified Unicode code point. For example, the code point 'Ⅻ' stands for the Roman number XII, which has the numeric value 12.
  There are two points of divergence between this method and the Unicode specification. This method treats the letters a-z (in both upper and lower cases, and their full-width variants) as numbers from 10 to 35. The Unicode specification also supports the idea of code points with non-integer numeric values; this method does not (except to the extent of returning -2 for such code points).
  
  Parameters:
  
  codePoint - the code point
  
  Returns:
  
  a non-negative numeric integer value if a numeric value for codePoint exists, -1 if there is no numeric value for codePoint, -2 if the numeric value can not be represented with an integer.
- getType
  
  public static int getType(char c)
  
  Gets the general Unicode category of the specified character.
  
  Parameters:
  
  c - the character to get the category of.
  
  Returns:
  
  the Unicode category of c.
- getType
  
  public static int getType(int codePoint)
  
  Gets the general Unicode category of the specified code point.
  
  Parameters:
  
  codePoint - the Unicode code point to get the category of.
  
  Returns:
  
  the Unicode category of codePoint.
- getDirectionality
  
  public static byte getDirectionality(char c)
  
  Gets the Unicode directionality of the specified character.
  
  Parameters:
  
  c - the character to get the directionality of.
  
  Returns:
  
  the Unicode directionality of c.
- getDirectionality
  
  public static byte getDirectionality(int codePoint)
  
  Gets the Unicode directionality of the specified character.
  
  Parameters:
  
  codePoint - the Unicode code point to get the directionality of.
  
  Returns:
  
  the Unicode directionality of codePoint.
- isMirrored
  
  public static boolean isMirrored(char c)
  
  Indicates whether the specified character is mirrored.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is mirrored; false otherwise.
- isMirrored
  
  public static boolean isMirrored(int codePoint)
  
  Indicates whether the specified code point is mirrored.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is mirrored, false otherwise.
- hashCode
  
  public int hashCode()
  
  Description copied from class: Object
  
  Returns an integer hash code for this object. By contract, any two objects for which Object.equals(java.lang.Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.
  Note that hash values must not change over time unless information used in equals comparisons also changes.
  See Writing a correct hashCode method if you intend implementing your own hashCode method.
  
  Overrides:
  
  hashCode in class Object
  
  Returns:
  
  this object's hash code.
  
  See Also:
  
  Object.equals(java.lang.Object)
- highSurrogate
  
  public static char highSurrogate(int codePoint)
  
  Returns the high surrogate for the given code point. The result is meaningless if the given code point is not a supplementary character.
  
  Since:
  
  1.7
- lowSurrogate
  
  public static char lowSurrogate(int codePoint)
  
  Returns the low surrogate for the given code point. The result is meaningless if the given code point is not a supplementary character.
  
  Since:
  
  1.7
- isAlphabetic
  
  public static boolean isAlphabetic(int codePoint)
  
  Returns true if the given code point is alphabetic. That is, if it is in any of the Lu, Ll, Lt, Lm, Lo, Nl, or Other_Alphabetic categories.
  
  Since:
  
  1.7
- isBmpCodePoint
  
  public static boolean isBmpCodePoint(int codePoint)
  
  Returns true if the given code point is in the Basic Multilingual Plane (BMP). Such code points can be represented by a single char.
  
  Since:
  
  1.7
- isDefined
  
  public static boolean isDefined(char c)
  
  Indicates whether the specified character is defined in the Unicode specification.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if the general Unicode category of the character is not UNASSIGNED; false otherwise.
- isDefined
  
  public static boolean isDefined(int codePoint)
  
  Indicates whether the specified code point is defined in the Unicode specification.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if the general Unicode category of the code point is not UNASSIGNED; false otherwise.
- isDigit
  
  public static boolean isDigit(char c)
  
  Indicates whether the specified character is a digit.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a digit; false otherwise.
- isDigit
  
  public static boolean isDigit(int codePoint)
  
  Indicates whether the specified code point is a digit.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is a digit; false otherwise.
- isIdentifierIgnorable
  
  public static boolean isIdentifierIgnorable(char c)
  
  Indicates whether the specified character is ignorable in a Java or Unicode identifier.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is ignorable; false otherwise.
- isIdeographic
  
  public static boolean isIdeographic(int codePoint)
  
  Returns true if the given code point is a CJKV ideographic character.
  
  Since:
  
  1.7
- isIdentifierIgnorable
  
  public static boolean isIdentifierIgnorable(int codePoint)
  
  Indicates whether the specified code point is ignorable in a Java or Unicode identifier.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is ignorable; false otherwise.
- isISOControl
  
  public static boolean isISOControl(char c)
  
  Indicates whether the specified character is an ISO control character.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is an ISO control character; false otherwise.
- isISOControl
  
  public static boolean isISOControl(int c)
  
  Indicates whether the specified code point is an ISO control character.
  
  Parameters:
  
  c - the code point to check.
  
  Returns:
  
  true if c is an ISO control character; false otherwise.
- isJavaIdentifierPart
  
  public static boolean isJavaIdentifierPart(char c)
  
  Indicates whether the specified character is a valid part of a Java identifier other than the first character.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is valid as part of a Java identifier; false otherwise.
- isJavaIdentifierPart
  
  public static boolean isJavaIdentifierPart(int codePoint)
  
  Indicates whether the specified code point is a valid part of a Java identifier other than the first character.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if c is valid as part of a Java identifier; false otherwise.
- isJavaIdentifierStart
  
  public static boolean isJavaIdentifierStart(char c)
  
  Indicates whether the specified character is a valid first character for a Java identifier.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a valid first character of a Java identifier; false otherwise.
- isJavaIdentifierStart
  
  public static boolean isJavaIdentifierStart(int codePoint)
  
  Indicates whether the specified code point is a valid first character for a Java identifier.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is a valid start of a Java identifier; false otherwise.
- isJavaLetter
  
  @Deprecated public static boolean isJavaLetter(char c)
  
  Deprecated.
  Use isJavaIdentifierStart(char) instead.
  
  Indicates whether the specified character is a Java letter.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a Java letter; false otherwise.
- isJavaLetterOrDigit
  
  @Deprecated public static boolean isJavaLetterOrDigit(char c)
  
  Deprecated.
  Use isJavaIdentifierPart(char) instead.
  
  Indicates whether the specified character is a Java letter or digit character.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a Java letter or digit; false otherwise.
- isLetter
  
  public static boolean isLetter(char c)
  
  Indicates whether the specified character is a letter.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a letter; false otherwise.
- isLetter
  
  public static boolean isLetter(int codePoint)
  
  Indicates whether the specified code point is a letter.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is a letter; false otherwise.
- isLetterOrDigit
  
  public static boolean isLetterOrDigit(char c)
  
  Indicates whether the specified character is a letter or a digit.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a letter or a digit; false otherwise.
- isLetterOrDigit
  
  public static boolean isLetterOrDigit(int codePoint)
  
  Indicates whether the specified code point is a letter or a digit.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is a letter or a digit; false otherwise.
- isLowerCase
  
  public static boolean isLowerCase(char c)
  
  Indicates whether the specified character is a lower case letter.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a lower case letter; false otherwise.
- isLowerCase
  
  public static boolean isLowerCase(int codePoint)
  
  Indicates whether the specified code point is a lower case letter.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is a lower case letter; false otherwise.
- isSpace
  
  @Deprecated public static boolean isSpace(char c)
  
  Deprecated.
  Use isWhitespace(char) instead.
  
  Use isWhitespace(char) instead.
- isSpaceChar
  
  public static boolean isSpaceChar(char c)
  
  See isSpaceChar(int).
- isSpaceChar
  
  public static boolean isSpaceChar(int codePoint)
  
  Returns true if the given code point is a Unicode space character. The exact set of characters considered as whitespace varies with Unicode version. Note that non-breaking spaces are considered whitespace. Note also that line separators are not considered whitespace; see isWhitespace(char) for an alternative.
- isTitleCase
  
  public static boolean isTitleCase(char c)
  
  Indicates whether the specified character is a titlecase character.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a titlecase character, false otherwise.
- isTitleCase
  
  public static boolean isTitleCase(int codePoint)
  
  Indicates whether the specified code point is a titlecase character.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is a titlecase character, false otherwise.
- isUnicodeIdentifierPart
  
  public static boolean isUnicodeIdentifierPart(char c)
  
  Indicates whether the specified character is valid as part of a Unicode identifier other than the first character.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is valid as part of a Unicode identifier; false otherwise.
- isUnicodeIdentifierPart
  
  public static boolean isUnicodeIdentifierPart(int codePoint)
  
  Indicates whether the specified code point is valid as part of a Unicode identifier other than the first character.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is valid as part of a Unicode identifier; false otherwise.
- isUnicodeIdentifierStart
  
  public static boolean isUnicodeIdentifierStart(char c)
  
  Indicates whether the specified character is a valid initial character for a Unicode identifier.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a valid first character for a Unicode identifier; false otherwise.
- isUnicodeIdentifierStart
  
  public static boolean isUnicodeIdentifierStart(int codePoint)
  
  Indicates whether the specified code point is a valid initial character for a Unicode identifier.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is a valid first character for a Unicode identifier; false otherwise.
- isUpperCase
  
  public static boolean isUpperCase(char c)
  
  Indicates whether the specified character is an upper case letter.
  
  Parameters:
  
  c - the character to check.
  
  Returns:
  
  true if c is a upper case letter; false otherwise.
- isUpperCase
  
  public static boolean isUpperCase(int codePoint)
  
  Indicates whether the specified code point is an upper case letter.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  true if codePoint is a upper case letter; false otherwise.
- isWhitespace
  
  public static boolean isWhitespace(char c)
  
  See isWhitespace(int).
- isWhitespace
  
  public static boolean isWhitespace(int codePoint)
  
  Returns true if the given code point is a Unicode whitespace character. The exact set of characters considered as whitespace varies with Unicode version. Note that non-breaking spaces are not considered whitespace. Note also that line separators are considered whitespace; see isSpaceChar(char) for an alternative.
- reverseBytes
  
  public static char reverseBytes(char c)
  
  Reverses the order of the first and second byte in the specified character.
  
  Parameters:
  
  c - the character to reverse.
  
  Returns:
  
  the character with reordered bytes.
- toLowerCase
  
  public static char toLowerCase(char c)
  
  Returns the lower case equivalent for the specified character if the character is an upper case letter. Otherwise, the specified character is returned unchanged.
  
  Parameters:
  
  c - the character
  
  Returns:
  
  if c is an upper case character then its lower case counterpart, otherwise just c.
- toLowerCase
  
  public static int toLowerCase(int codePoint)
  
  Returns the lower case equivalent for the specified code point if it is an upper case letter. Otherwise, the specified code point is returned unchanged.
  
  Parameters:
  
  codePoint - the code point to check.
  
  Returns:
  
  if codePoint is an upper case character then its lower case counterpart, otherwise just codePoint.
- toString
  
  public String toString()
  
  Description copied from class: Object
  Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
  getClass().getName() + '@' + Integer.toHexString(hashCode())
  
  See Writing a useful toString method if you intend implementing your own toString method.
  Overrides:
  
  toString in class Object
  
  Returns:
  
  a printable representation of this object.
- toString
  
  public static String toString(char value)
  
  Converts the specified character to its string representation.
  
  Parameters:
  
  value - the character to convert.
  
  Returns:
  
  the character converted to a string.
- toTitleCase
  
  public static char toTitleCase(char c)
  
  Returns the title case equivalent for the specified character if it exists. Otherwise, the specified character is returned unchanged.
  
  Parameters:
  
  c - the character to convert.
  
  Returns:
  
  the title case equivalent of c if it exists, otherwise c.
- toTitleCase
  
  public static int toTitleCase(int codePoint)
  
  Returns the title case equivalent for the specified code point if it exists. Otherwise, the specified code point is returned unchanged.
  
  Parameters:
  
  codePoint - the code point to convert.
  
  Returns:
  
  the title case equivalent of codePoint if it exists, otherwise codePoint.
- toUpperCase
  
  public static char toUpperCase(char c)
  
  Returns the upper case equivalent for the specified character if the character is a lower case letter. Otherwise, the specified character is returned unchanged.
  
  Parameters:
  
  c - the character to convert.
  
  Returns:
  
  if c is a lower case character then its upper case counterpart, otherwise just c.
- toUpperCase
  
  public static int toUpperCase(int codePoint)
  
  Returns the upper case equivalent for the specified code point if the code point is a lower case letter. Otherwise, the specified code point is returned unchanged.
  
  Parameters:
  
  codePoint - the code point to convert.
  
  Returns:
  
  if codePoint is a lower case character then its upper case counterpart, otherwise just codePoint.

Modifier and Type	Class	Description
`static class`	`Character.Subset`
`static class`	`Character.UnicodeBlock`	Represents a block of Unicode characters.

Class Character

Unicode categories

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Details

MIN_VALUE

MAX_VALUE

MIN_RADIX

MAX_RADIX

TYPE

UNASSIGNED

UPPERCASE_LETTER

LOWERCASE_LETTER

TITLECASE_LETTER

MODIFIER_LETTER

OTHER_LETTER

NON_SPACING_MARK

ENCLOSING_MARK

COMBINING_SPACING_MARK

DECIMAL_DIGIT_NUMBER

LETTER_NUMBER

OTHER_NUMBER

SPACE_SEPARATOR

LINE_SEPARATOR

PARAGRAPH_SEPARATOR

CONTROL

FORMAT

PRIVATE_USE

SURROGATE

DASH_PUNCTUATION

START_PUNCTUATION

END_PUNCTUATION

CONNECTOR_PUNCTUATION

OTHER_PUNCTUATION

MATH_SYMBOL

CURRENCY_SYMBOL

MODIFIER_SYMBOL

OTHER_SYMBOL

INITIAL_QUOTE_PUNCTUATION

FINAL_QUOTE_PUNCTUATION

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

MIN_HIGH_SURROGATE

MAX_HIGH_SURROGATE

MIN_LOW_SURROGATE

MAX_LOW_SURROGATE

MIN_SURROGATE

MAX_SURROGATE

MIN_SUPPLEMENTARY_CODE_POINT

MIN_CODE_POINT

MAX_CODE_POINT

SIZE

Constructor Details

Character

Method Details

charValue

compareTo

compare

valueOf