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Showing content from https://docs.oracle.com/en/java/javase/24/docs/api/java.base/java/lang/Character.html below:

Character (Java SE 24 & JDK 24)

All Implemented Interfaces:

Serializable, Comparable<Character>, Constable

• Nested Class Summary

  Nested Classes

  static class 

  Instances of this class represent particular subsets of the Unicode character set.

  static final class 

  A family of character subsets representing the character blocks in the Unicode specification.

  static enum 

• Field Summary

  Fields

  static final int

  The number of bytes used to represent a char value in unsigned binary form.

  static final byte

  General category "Mc" in the Unicode specification.

  static final byte

  General category "Pc" in the Unicode specification.

  static final byte

  General category "Cc" in the Unicode specification.

  static final byte

  General category "Sc" in the Unicode specification.

  static final byte

  General category "Pd" in the Unicode specification.

  static final byte

  General category "Nd" in the Unicode specification.

  static final byte

  Weak bidirectional character type "AN" in the Unicode specification.

  static final byte

  Weak bidirectional character type "BN" in the Unicode specification.

  static final byte

  Weak bidirectional character type "CS" in the Unicode specification.

  static final byte

  Weak bidirectional character type "EN" in the Unicode specification.

  static final byte

  Weak bidirectional character type "ES" in the Unicode specification.

  static final byte

  Weak bidirectional character type "ET" in the Unicode specification.

  static final byte

  Weak bidirectional character type "FSI" in the Unicode specification.

  static final byte

  Strong bidirectional character type "L" in the Unicode specification.

  static final byte

  Strong bidirectional character type "LRE" in the Unicode specification.

  static final byte

  Weak bidirectional character type "LRI" in the Unicode specification.

  static final byte

  Strong bidirectional character type "LRO" in the Unicode specification.

  static final byte

  Weak bidirectional character type "NSM" in the Unicode specification.

  static final byte

  Neutral bidirectional character type "ON" in the Unicode specification.

  static final byte

  Neutral bidirectional character type "B" in the Unicode specification.

  static final byte

  Weak bidirectional character type "PDF" in the Unicode specification.

  static final byte

  Weak bidirectional character type "PDI" in the Unicode specification.

  static final byte

  Strong bidirectional character type "R" in the Unicode specification.

  static final byte

  Strong bidirectional character type "AL" in the Unicode specification.

  static final byte

  Strong bidirectional character type "RLE" in the Unicode specification.

  static final byte

  Weak bidirectional character type "RLI" in the Unicode specification.

  static final byte

  Strong bidirectional character type "RLO" in the Unicode specification.

  static final byte

  Neutral bidirectional character type "S" in the Unicode specification.

  static final byte

  Undefined bidirectional character type.

  static final byte

  Neutral bidirectional character type "WS" in the Unicode specification.

  static final byte

  General category "Me" in the Unicode specification.

  static final byte

  General category "Pe" in the Unicode specification.

  static final byte

  General category "Pf" in the Unicode specification.

  static final byte

  General category "Cf" in the Unicode specification.

  static final byte

  General category "Pi" in the Unicode specification.

  static final byte

  General category "Nl" in the Unicode specification.

  static final byte

  General category "Zl" in the Unicode specification.

  static final byte

  General category "Ll" in the Unicode specification.

  static final byte

  General category "Sm" in the Unicode specification.

  static final int

  static final char

  static final char

  static final int

  The maximum radix available for conversion to and from strings.

  static final char

  The maximum value of a Unicode surrogate code unit in the UTF-16 encoding, constant '\uDFFF'.

  static final char

  The constant value of this field is the largest value of type char, '\uFFFF'.

  static final int

  static final char

  static final char

  static final int

  The minimum radix available for conversion to and from strings.

  static final int

  static final char

  The minimum value of a Unicode surrogate code unit in the UTF-16 encoding, constant '\uD800'.

  static final char

  The constant value of this field is the smallest value of type char, '\u0000'.

  static final byte

  General category "Lm" in the Unicode specification.

  static final byte

  General category "Sk" in the Unicode specification.

  static final byte

  General category "Mn" in the Unicode specification.

  static final byte

  General category "Lo" in the Unicode specification.

  static final byte

  General category "No" in the Unicode specification.

  static final byte

  General category "Po" in the Unicode specification.

  static final byte

  General category "So" in the Unicode specification.

  static final byte

  General category "Zp" in the Unicode specification.

  static final byte

  General category "Co" in the Unicode specification.

  static final int

  The number of bits used to represent a char value in unsigned binary form, constant 16.

  static final byte

  General category "Zs" in the Unicode specification.

  static final byte

  General category "Ps" in the Unicode specification.

  static final byte

  General category "Cs" in the Unicode specification.

  static final byte

  General category "Lt" in the Unicode specification.

  The Class instance representing the primitive type char.

  static final byte

  General category "Cn" in the Unicode specification.

  static final byte

  General category "Lu" in the Unicode specification.

• Constructor Summary

  Constructors

  Deprecated, for removal: This API element is subject to removal in a future version.
• Method Summary

  static int

  Determines the number of char values needed to represent the specified character (Unicode code point).

  char

  Returns the value of this Character object.

  static int

  Returns the code point at the given index of the char array.

  static int

  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

  Returns the code point at the given index of the CharSequence.

  static int

  Returns the code point preceding the given index of the char array.

  static int

  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

  Returns the code point preceding the given index of the CharSequence.

  static int

  Returns the number of Unicode code points in a subarray of the char array argument.

  static int

  Returns the number of Unicode code points in the text range of the specified char sequence.

  static int

  Returns the code point value of the Unicode character specified by the given character name.

  static int

  Compares two char values numerically.

  int

  Compares two Character objects numerically.

  Returns an

  Optional

  containing the nominal descriptor for this instance.

  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

  Compares this object against the specified object.

  static char

  Determines the character representation for a specific digit in the specified radix.

  static byte

  Returns the Unicode directionality property for the given character.

  static byte

  Returns the Unicode directionality property for the given character (Unicode code point).

  Returns the name of the specified character

  codePoint

  , or null if the code point is

  unassigned

  .

  static int

  Returns the int value that the specified Unicode character represents.

  static int

  Returns the int value that the specified character (Unicode code point) represents.

  static int

  Returns a value indicating a character's general category.

  static int

  Returns a value indicating a character's general category.

  int

  Returns a hash code for this Character; equal to the result of invoking charValue().

  static int

  Returns a hash code for a char value; compatible with Character.hashCode().

  static char

  static boolean

  Determines if the specified character (Unicode code point) is alphabetic.

  static boolean

  static boolean

  Determines if a character is defined in Unicode.

  static boolean

  Determines if a character (Unicode code point) is defined in Unicode.

  static boolean

  Determines if the specified character is a digit.

  static boolean

  Determines if the specified character (Unicode code point) is a digit.

  static boolean

  Determines if the specified character (Unicode code point) is an Emoji.

  static boolean

  Determines if the specified character (Unicode code point) is an Emoji Component.

  static boolean

  Determines if the specified character (Unicode code point) is an Emoji Modifier.

  static boolean

  Determines if the specified character (Unicode code point) is an Emoji Modifier Base.

  static boolean

  Determines if the specified character (Unicode code point) has the Emoji Presentation property by default.

  static boolean

  Determines if the specified character (Unicode code point) is an Extended Pictographic.

  static boolean

  static boolean

  Determines if the specified character should be regarded as an ignorable character in a Java identifier or a Unicode identifier.

  static boolean

  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

  Determines if the specified character (Unicode code point) is a CJKV (Chinese, Japanese, Korean and Vietnamese) ideograph, as defined by the Unicode Standard.

  static boolean

  Determines if the specified character is an ISO control character.

  static boolean

  Determines if the referenced character (Unicode code point) is an ISO control character.

  static boolean

  Determines if the specified character may be part of a Java identifier as other than the first character.

  static boolean

  Determines if the character (Unicode code point) may be part of a Java identifier as other than the first character.

  static boolean

  Determines if the specified character is permissible as the first character in a Java identifier.

  static boolean

  Determines if the character (Unicode code point) is permissible as the first character in a Java identifier.

  static boolean

  static boolean

  static boolean

  Determines if the specified character is a letter.

  static boolean

  Determines if the specified character (Unicode code point) is a letter.

  static boolean

  Determines if the specified character is a letter or digit.

  static boolean

  Determines if the specified character (Unicode code point) is a letter or digit.

  static boolean

  Determines if the specified character is a lowercase character.

  static boolean

  Determines if the specified character (Unicode code point) is a lowercase character.

  static boolean

  static boolean

  Determines whether the character is mirrored according to the Unicode specification.

  static boolean

  Determines whether the specified character (Unicode code point) is mirrored according to the Unicode specification.

  static boolean

  static boolean

  Determines if the specified character is a Unicode space character.

  static boolean

  Determines if the specified character (Unicode code point) is a Unicode space character.

  static boolean

  static boolean

  Determines if the given char value is a Unicode surrogate code unit.

  static boolean

  static boolean

  Determines if the specified character is a titlecase character.

  static boolean

  Determines if the specified character (Unicode code point) is a titlecase character.

  static boolean

  Determines if the specified character may be part of a Unicode identifier as other than the first character.

  static boolean

  Determines if the specified character (Unicode code point) may be part of a Unicode identifier as other than the first character.

  static boolean

  Determines if the specified character is permissible as the first character in a Unicode identifier.

  static boolean

  Determines if the specified character (Unicode code point) is permissible as the first character in a Unicode identifier.

  static boolean

  Determines if the specified character is an uppercase character.

  static boolean

  Determines if the specified character (Unicode code point) is an uppercase character.

  static boolean

  static boolean

  Determines if the specified character is white space according to Java.

  static boolean

  Determines if the specified character (Unicode code point) is white space according to Java.

  static char

  static int

  Returns the index within the given char subarray that is offset from the given index by codePointOffset code points.

  static int

  Returns the index within the given char sequence that is offset from the given index by codePointOffset code points.

  static char

  Returns the value obtained by reversing the order of the bytes in the specified char value.

  static char[]

  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

  Converts the specified surrogate pair to its supplementary code point value.

  static char

  Converts the character argument to lowercase using case mapping information from the UnicodeData file.

  static int

  Converts the character (Unicode code point) argument to lowercase using case mapping information from the UnicodeData file.

  Returns a String object representing this Character's value.

  Returns a String object representing the specified char.

  Returns a String object representing the specified character (Unicode code point).

  static char

  Converts the character argument to titlecase using case mapping information from the UnicodeData file.

  static int

  Converts the character (Unicode code point) argument to titlecase using case mapping information from the UnicodeData file.

  static char

  Converts the character argument to uppercase using case mapping information from the UnicodeData file.

  static int

  Converts the character (Unicode code point) argument to uppercase using case mapping information from the UnicodeData file.

  Returns a Character instance representing the specified char value.

• Field Details
  • MIN_RADIX
  • MAX_RADIX
  • MIN_VALUE
  • MAX_VALUE
  • 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
  • DIRECTIONALITY_LEFT_TO_RIGHT_ISOLATE
  • DIRECTIONALITY_RIGHT_TO_LEFT_ISOLATE
  • DIRECTIONALITY_FIRST_STRONG_ISOLATE
  • DIRECTIONALITY_POP_DIRECTIONAL_ISOLATE
  • 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
  • BYTES
• Constructor Details
  • Character
• Method Details
  • describeConstable
  • valueOf
  • charValue
  • hashCode
  • hashCode
  • equals
  • toString
  • toString
  • toString
  • isValidCodePoint
  • isBmpCodePoint
  • isSupplementaryCodePoint
  • isHighSurrogate
  • isLowSurrogate
  • isSurrogate
  • isSurrogatePair
  • charCount
  • toCodePoint
  • codePointAt
  • codePointAt
  • codePointAt
  • codePointBefore
  • codePointBefore
  • codePointBefore
  • highSurrogate
  • lowSurrogate
  • toChars
  • toChars
  • codePointCount
  • codePointCount
  • offsetByCodePoints
  • offsetByCodePoints
  • isLowerCase
  • isLowerCase
  • isUpperCase
  • isUpperCase
  • isTitleCase
  • isTitleCase
  • isDigit
  • isDigit
  • isDefined
  • isDefined
  • isLetter
  • isLetter
  • isLetterOrDigit
  • isLetterOrDigit
  • isJavaLetter
  • isJavaLetterOrDigit
  • isAlphabetic
  • isIdeographic
  • isJavaIdentifierStart
  • isJavaIdentifierStart
  • isJavaIdentifierPart
  • isJavaIdentifierPart
  • isUnicodeIdentifierStart
  • isUnicodeIdentifierStart
  • isUnicodeIdentifierPart
  • isUnicodeIdentifierPart
  • isIdentifierIgnorable
  • isIdentifierIgnorable
  • isEmoji
  • isEmojiPresentation
  • isEmojiModifier
  • isEmojiModifierBase
  • isEmojiComponent
  • isExtendedPictographic
  • toLowerCase
  • toLowerCase
  • toUpperCase
  • toUpperCase
  • toTitleCase
  • toTitleCase
  • digit
  • digit
  • getNumericValue
  • getNumericValue
  • isSpace
  • isSpaceChar
  • isSpaceChar
  • isWhitespace
  • isWhitespace
  • isISOControl
  • isISOControl
  • getType
  • getType
  • forDigit
  • getDirectionality
  • getDirectionality
  • isMirrored
  • isMirrored
  • compareTo
  • compare
  • reverseBytes
  • getName
  • codePointOf

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