Class Character

Mc = Mark, Spacing Combining (Normative).

Since: 1.1

Pc = Punctuation, Connector (Informative).

Since: 1.1

Cc = Other, Control (Normative).

Since: 1.1

Sc = Symbol, Currency (Informative).

Since: 1.1

Pd = Punctuation, Dash (Informative).

Since: 1.1

Nd = Number, Decimal Digit (Normative).

Since: 1.1

Weak bidirectional character type "AN".

Since: 1.4

Weak bidirectional character type "BN".

Since: 1.4

Weak bidirectional character type "CS".

Since: 1.4

Weak bidirectional character type "EN".

Since: 1.4

Weak bidirectional character type "ES".

Since: 1.4

Weak bidirectional character type "ET".

Since: 1.4

Strong bidirectional character type "L".

Since: 1.4

Strong bidirectional character type "LRE".

Since: 1.4

Strong bidirectional character type "LRO".

Since: 1.4

Weak bidirectional character type "NSM".

Since: 1.4

Neutral bidirectional character type "ON".

Since: 1.4

Neutral bidirectional character type "B".

Since: 1.4

Weak bidirectional character type "PDF".

Since: 1.4

Strong bidirectional character type "R".

Since: 1.4

Strong bidirectional character type "AL".

Since: 1.4

Strong bidirectional character type "RLE".

Since: 1.4

Strong bidirectional character type "RLO".

Since: 1.4

Neutral bidirectional character type "S".

Since: 1.4

Undefined bidirectional character type. Undefined char values have undefined directionality in the Unicode specification.

Since: 1.4

Strong bidirectional character type "WS".

Since: 1.4

Me = Mark, Enclosing (Normative).

Since: 1.1

Pe = Punctuation, Close (Informative).

Since: 1.1

Pf = Punctuation, Final Quote (Informative).

Since: 1.4

Cf = Other, Format (Normative).

Since: 1.1

Pi = Punctuation, Initial Quote (Informative).

Since: 1.4

Nl = Number, Letter (Normative).

Since: 1.1

Zl = Separator, Line (Normative).

Since: 1.1

Ll = Letter, Lowercase (Informative).

Since: 1.1

Sm = Symbol, Math (Informative).

Since: 1.1

The maximum Unicode 4.0 code point, which is greater than the range of the char data type. This value is 0x10FFFF.

Since: 1.5

The maximum Unicode high surrogate code unit, or leading-surrogate, in the UTF-16 character encoding. This value is '?'.

Since: 1.5

The maximum Unicode low surrogate code unit, or trailing-surrogate, in the UTF-16 character encoding. This value is '?'.

Since: 1.5

Largest value allowed for radix arguments in Java. This value is 36.

See Also: Character Character Integer valueOf

The maximum Unicode surrogate code unit in the UTF-16 character encoding. This value is '?'.

Since: 1.5

The maximum value the char data type can hold. This value is '\\uFFFF'.

The minimum Unicode 4.0 code point. This value is 0.

Since: 1.5

The minimum Unicode high surrogate code unit, or leading-surrogate, in the UTF-16 character encoding. This value is '?'.

Since: 1.5

The minimum Unicode low surrogate code unit, or trailing-surrogate, in the UTF-16 character encoding. This value is '?'.

Since: 1.5

Smallest value allowed for radix arguments in Java. This value is 2.

See Also: Character Character Integer valueOf

The lowest possible supplementary Unicode code point (the first code point outside the basic multilingual plane (BMP)). This value is 0x10000.

The minimum Unicode surrogate code unit in the UTF-16 character encoding. This value is '?'.

Since: 1.5

The minimum value the char data type can hold. This value is '\\u0000'.

Lm = Letter, Modifier (Informative).

Since: 1.1

Sk = Symbol, Modifier (Informative).

Since: 1.1

Mn = Mark, Non-Spacing (Normative).

Since: 1.1

Lo = Letter, Other (Informative).

Since: 1.1

No = Number, Other (Normative).

Since: 1.1

Po = Punctuation, Other (Informative).

Since: 1.1

So = Symbol, Other (Informative).

Since: 1.1

Zp = Separator, Paragraph (Normative).

Since: 1.1

Co = Other, Private Use (Normative).

Since: 1.1

The number of bits needed to represent a char.

Since: 1.5

Zs = Separator, Space (Normative).

Since: 1.1

Ps = Punctuation, Open (Informative).

Since: 1.1

Cs = Other, Surrogate (Normative).

Since: 1.1

Lt = Letter, Titlecase (Informative).

Since: 1.1

Class object representing the primitive char data type.

Since: 1.1

Cn = Other, Not Assigned (Normative).

Since: 1.1

Lu = Letter, Uppercase (Informative).

Since: 1.1

Wraps up a character.

Parameters: value the character to wrap

Return number of 16-bit characters required to represent the given code point.

Parameters: codePoint a unicode code point

Returns: 2 if codePoint >= 0x10000, 1 otherwise.

Since: 1.5

Returns the character which has been wrapped by this class.

Returns: the character wrapped

Get the code point at the specified index in the CharSequence. This is like CharSequence#charAt(int), but if the character is the start of a surrogate pair, and there is a following character, and this character completes the pair, then the corresponding supplementary code point is returned. Otherwise, the character at the index is returned.

Parameters: sequence the CharSequence index the index of the codepoint to get, starting at 0

Returns: the codepoint at the specified index

Throws: IndexOutOfBoundsException if index is negative or >= length()

Since: 1.5

Get the code point at the specified index in the CharSequence. If the character is the start of a surrogate pair, and there is a following character, and this character completes the pair, then the corresponding supplementary code point is returned. Otherwise, the character at the index is returned.

Parameters: chars the character array in which to look index the index of the codepoint to get, starting at 0

Returns: the codepoint at the specified index

Throws: IndexOutOfBoundsException if index is negative or >= length()

Since: 1.5

Get the code point at the specified index in the CharSequence. If the character is the start of a surrogate pair, and there is a following character within the specified range, and this character completes the pair, then the corresponding supplementary code point is returned. Otherwise, the character at the index is returned.

Parameters: chars the character array in which to look index the index of the codepoint to get, starting at 0 limit the limit past which characters should not be examined

Returns: the codepoint at the specified index

Throws: IndexOutOfBoundsException if index is negative or >= limit, or if limit is negative or >= the length of the array

Since: 1.5

Get the code point before the specified index. This is like #codePointAt(char[], int), but checks the characters at index-1 and index-2 to see if they form a supplementary code point. If they do not, the character at index-1 is returned.

Parameters: chars the character array index the index just past the codepoint to get, starting at 0

Returns: the codepoint at the specified index

Throws: IndexOutOfBoundsException if index is negative or >= length()

Since: 1.5

Get the code point before the specified index. This is like #codePointAt(char[], int), but checks the characters at index-1 and index-2 to see if they form a supplementary code point. If they do not, the character at index-1 is returned. The start parameter is used to limit the range of the array which may be examined.

Parameters: chars the character array index the index just past the codepoint to get, starting at 0 start the index before which characters should not be examined

Returns: the codepoint at the specified index

Throws: IndexOutOfBoundsException if index is > start or > the length of the array, or if limit is negative or >= the length of the array

Since: 1.5

Get the code point before the specified index. This is like #codePointAt(CharSequence, int), but checks the characters at index-1 and index-2 to see if they form a supplementary code point. If they do not, the character at index-1 is returned.

Parameters: sequence the CharSequence index the index just past the codepoint to get, starting at 0

Returns: the codepoint at the specified index

Throws: IndexOutOfBoundsException if index is negative or >= length()

Since: 1.5

Returns the number of Unicode code points in the specified range of the given CharSequence. The first char in the range is at position beginIndex and the last one is at position endIndex - 1. Paired surrogates (supplementary characters are represented by a pair of chars - one from the high surrogates and one from the low surrogates) count as just one code point.

Parameters: seq the CharSequence to inspect beginIndex the beginning of the range endIndex the end of the range

Returns: the number of Unicode code points in the given range of the sequence

Throws: NullPointerException if seq is null IndexOutOfBoundsException if beginIndex is negative, endIndex is larger than the length of seq, or if beginIndex is greater than endIndex.

Since: 1.5

Returns the number of Unicode code points in the specified range of the given char array. The first char in the range is at position offset and the length of the range is count. Paired surrogates (supplementary characters are represented by a pair of chars - one from the high surrogates and one from the low surrogates) count as just one code point.

Parameters: a the char array to inspect offset the beginning of the range count the length of the range

Returns: the number of Unicode code points in the given range of the array

Throws: NullPointerException if a is null IndexOutOfBoundsException if offset or count is negative or if offset + countendIndex is larger than the length of a.

Since: 1.5

Compares another Character to this Character, numerically.

Parameters: anotherCharacter Character to compare with this Character

Returns: a negative integer if this Character is less than anotherCharacter, zero if this Character is equal, and a positive integer if this Character is greater

Throws: NullPointerException if anotherCharacter is null

Since: 1.2

Converts a character into a digit of the specified radix. If the radix exceeds MIN_RADIX or MAX_RADIX, or if the result of getNumericValue(ch) exceeds the radix, or if ch is not a decimal digit or in the case insensitive set of 'a'-'z', the result is -1.
character argument boundary = [Nd]|U+0041-U+005A|U+0061-U+007A |U+FF21-U+FF3A|U+FF41-U+FF5A

Parameters: ch character to convert into a digit radix radix in which ch is a digit

Returns: digit which ch represents in radix, or -1 not a valid digit

See Also: MIN_RADIX MAX_RADIX Character Character Character

Converts a character into a digit of the specified radix. If the radix exceeds MIN_RADIX or MAX_RADIX, or if the result of getNumericValue(ch) exceeds the radix, or if ch is not a decimal digit or in the case insensitive set of 'a'-'z', the result is -1.
character argument boundary = [Nd]|U+0041-U+005A|U+0061-U+007A |U+FF21-U+FF3A|U+FF41-U+FF5A

Parameters: codePoint character to convert into a digit radix radix in which ch is a digit

Returns: digit which ch represents in radix, or -1 not a valid digit

See Also: MIN_RADIX MAX_RADIX Character Character Character

Determines if an object is equal to this object. This is only true for another Character object wrapping the same value.

Parameters: o object to compare

Returns: true if o is a Character with the same value

Converts a digit into a character which represents that digit in a specified radix. If the radix exceeds MIN_RADIX or MAX_RADIX, or the digit exceeds the radix, then the null character '\0' is returned. Otherwise the return value is in '0'-'9' and 'a'-'z'.
return value boundary = U+0030-U+0039|U+0061-U+007A

Parameters: digit digit to be converted into a character radix radix of digit

Returns: character representing digit in radix, or '\0'

See Also: MIN_RADIX MAX_RADIX Character

Returns the Unicode directionality property of the character. This is used in the visual ordering of text.

Parameters: ch the character to look up

Returns: the directionality constant, or DIRECTIONALITY_UNDEFINED

Since: 1.4

See Also: 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

Returns the Unicode directionality property of the character. This is used in the visual ordering of text.

Parameters: codePoint the character to look up

Returns: the directionality constant, or DIRECTIONALITY_UNDEFINED

Since: 1.5

See Also: 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

Returns the Unicode numeric value property of a character. For example, '\\u216C' (the Roman numeral fifty) returns 50.

This method also returns values for the letters A through Z, (not specified by Unicode), in these ranges: 'A' through 'Z' (uppercase); 'a' through 'z' (lowercase); and 'Ａ' through 'Ｚ', 'ａ' through 'ｚ' (full width variants).

If the character lacks a numeric value property, -1 is returned. If the character has a numeric value property which is not representable as a nonnegative integer, such as a fraction, -2 is returned. character argument boundary = [Nd]|[Nl]|[No]|U+0041-U+005A|U+0061-U+007A |U+FF21-U+FF3A|U+FF41-U+FF5A

Parameters: ch character from which the numeric value property will be retrieved

Returns: the numeric value property of ch, or -1 if it does not exist, or -2 if it is not representable as a nonnegative integer

Since: 1.1

See Also: Character Character Character

Returns the Unicode numeric value property of a character. For example, '\\u216C' (the Roman numeral fifty) returns 50.

This method also returns values for the letters A through Z, (not specified by Unicode), in these ranges: 'A' through 'Z' (uppercase); 'a' through 'z' (lowercase); and 'Ａ' through 'Ｚ', 'ａ' through 'ｚ' (full width variants).

If the character lacks a numeric value property, -1 is returned. If the character has a numeric value property which is not representable as a nonnegative integer, such as a fraction, -2 is returned. character argument boundary = [Nd]|[Nl]|[No]|U+0041-U+005A|U+0061-U+007A |U+FF21-U+FF3A|U+FF41-U+FF5A

Parameters: codePoint character from which the numeric value property will be retrieved

Returns: the numeric value property of ch, or -1 if it does not exist, or -2 if it is not representable as a nonnegative integer

Since: 1.5

See Also: Character Character Character

Returns the Unicode general category property of a character.

Parameters: ch character from which the general category property will be retrieved

Returns: the character category property of ch as an integer

Since: 1.1

See Also: 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 INITIAL_QUOTE_PUNCTUATION FINAL_QUOTE_PUNCTUATION

Returns the Unicode general category property of a character.

Parameters: codePoint character from which the general category property will be retrieved

Returns: the character category property of ch as an integer

Since: 1.5

See Also: 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 INITIAL_QUOTE_PUNCTUATION FINAL_QUOTE_PUNCTUATION

Returns the numerical value (unsigned) of the wrapped character. Range of returned values: 0x0000-0xFFFF.

Returns: the value of the wrapped character

Determines if a character is part of the Unicode Standard. This is an evolving standard, but covers every character in the data file.
defined = not [Cn]

Parameters: ch character to test

Returns: true if ch is a Unicode character, else false

See Also: Character Character Character Character Character Character

Determines if a character is part of the Unicode Standard. This is an evolving standard, but covers every character in the data file.
defined = not [Cn]

Parameters: codePoint character to test

Returns: true if ch is a Unicode character, else false

Since: 1.5

See Also: Character Character Character Character Character

Determines if a character is a Unicode decimal digit. For example, '0' is a digit. A character is a Unicode digit if getType() returns DECIMAL_DIGIT_NUMBER.
Unicode decimal digit = [Nd]

Parameters: ch character to test

Returns: true if ch is a Unicode decimal digit, else false

See Also: Character Character Character

Determines if a character is a Unicode decimal digit. For example, '0' is a digit. A character is a Unicode digit if getType() returns DECIMAL_DIGIT_NUMBER.
Unicode decimal digit = [Nd]

Parameters: codePoint character to test

Returns: true if ch is a Unicode decimal digit, else false

Since: 1.5

See Also: Character Character

Return true if the given character is a high surrogate.

Parameters: ch the character

Returns: true if the character is a high surrogate character

Since: 1.5

Determines if a character is ignorable in a Unicode identifier. This includes the non-whitespace ISO control characters ('' through '', '' through '', and '' through 'Ÿ'), and FORMAT characters.
Unicode identifier ignorable = [Cf]|U+0000-U+0008|U+000E-U+001B |U+007F-U+009F

Parameters: ch character to test

Returns: true if ch is ignorable in a Unicode or Java identifier

Since: 1.1

See Also: Character Character

Determines if a character is ignorable in a Unicode identifier. This includes the non-whitespace ISO control characters ('' through '', '' through '', and '' through 'Ÿ'), and FORMAT characters.
Unicode identifier ignorable = [Cf]|U+0000-U+0008|U+000E-U+001B |U+007F-U+009F

Parameters: codePoint character to test

Returns: true if ch is ignorable in a Unicode or Java identifier

Since: 1.5

See Also: Character Character

Determines if a character has the ISO Control property.
ISO Control = [Cc]

Parameters: ch character to test

Returns: true if ch is an ISO Control character, else false

Since: 1.1

See Also: Character Character

Determines if the character is an ISO Control character. This is true if the code point is in the range [0, 0x001F] or if it is in the range [0x007F, 0x009F].

Parameters: codePoint the character to check

Returns: true if the character is in one of the above ranges

Since: 1.5

Determines if a character can follow the first letter in a Java identifier. This is the combination of isJavaLetter (isLetter, type of LETTER_NUMBER, currency, connecting punctuation) and digit, numeric letter (like Roman numerals), combining marks, non-spacing marks, or isIdentifierIgnorable.
Java identifier extender = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nl]|[Sc]|[Pc]|[Mn]|[Mc]|[Nd]|[Cf] |U+0000-U+0008|U+000E-U+001B|U+007F-U+009F

Parameters: ch character to test

Returns: true if ch can follow the first letter in a Java identifier

Since: 1.1

See Also: Character Character Character Character

Determines if a character can follow the first letter in a Java identifier. This is the combination of isJavaLetter (isLetter, type of LETTER_NUMBER, currency, connecting punctuation) and digit, numeric letter (like Roman numerals), combining marks, non-spacing marks, or isIdentifierIgnorable.
Java identifier extender = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nl]|[Sc]|[Pc]|[Mn]|[Mc]|[Nd]|[Cf] |U+0000-U+0008|U+000E-U+001B|U+007F-U+009F

Parameters: codePoint character to test

Returns: true if ch can follow the first letter in a Java identifier

Since: 1.5

See Also: Character Character Character Character

Determines if a character can start a Java identifier. This is the combination of isLetter, any character where getType returns LETTER_NUMBER, currency symbols (like '$'), and connecting punctuation (like '_').
Java identifier start = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nl]|[Sc]|[Pc]

Parameters: ch character to test

Returns: true if ch can start a Java identifier, else false

Since: 1.1

See Also: Character Character Character

Determines if a character can start a Java identifier. This is the combination of isLetter, any character where getType returns LETTER_NUMBER, currency symbols (like '$'), and connecting punctuation (like '_').
Java identifier start = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nl]|[Sc]|[Pc]

Parameters: codePoint character to test

Returns: true if ch can start a Java identifier, else false

Since: 1.5

See Also: Character Character Character

Deprecated: Replaced by {@link #isJavaIdentifierStart(char)}

Determines if a character can start a Java identifier. This is the combination of isLetter, any character where getType returns LETTER_NUMBER, currency symbols (like '$'), and connecting punctuation (like '_').

Parameters: ch character to test

Returns: true if ch can start a Java identifier, else false

See Also: Character Character Character Character Character Character

Deprecated: Replaced by {@link #isJavaIdentifierPart(char)}

Determines if a character can follow the first letter in a Java identifier. This is the combination of isJavaLetter (isLetter, type of LETTER_NUMBER, currency, connecting punctuation) and digit, numeric letter (like Roman numerals), combining marks, non-spacing marks, or isIdentifierIgnorable.

Parameters: ch character to test

Returns: true if ch can follow the first letter in a Java identifier

See Also: Character Character Character Character Character Character Character

Determines if a character is a Unicode letter. Not all letters have case, so this may return true when isLowerCase and isUpperCase return false. A character is a Unicode letter if getType() returns one of UPPERCASE_LETTER, LOWERCASE_LETTER, TITLECASE_LETTER, MODIFIER_LETTER, or OTHER_LETTER.
letter = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]

Parameters: ch character to test

Returns: true if ch is a Unicode letter, else false

See Also: Character Character Character Character Character Character Character Character Character

Determines if a character is a Unicode letter. Not all letters have case, so this may return true when isLowerCase and isUpperCase return false. A character is a Unicode letter if getType() returns one of UPPERCASE_LETTER, LOWERCASE_LETTER, TITLECASE_LETTER, MODIFIER_LETTER, or OTHER_LETTER.
letter = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]

Parameters: codePoint character to test

Returns: true if ch is a Unicode letter, else false

Since: 1.5

See Also: Character Character Character Character Character Character Character Character

Determines if a character is a Unicode letter or a Unicode digit. This is the combination of isLetter and isDigit.
letter or digit = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nd]

Parameters: ch character to test

Returns: true if ch is a Unicode letter or a Unicode digit, else false

See Also: Character Character Character Character Character Character

Determines if a character is a Unicode letter or a Unicode digit. This is the combination of isLetter and isDigit.
letter or digit = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nd]

Parameters: codePoint character to test

Returns: true if ch is a Unicode letter or a Unicode digit, else false

Since: 1.5

See Also: Character Character Character Character Character

Determines if a character is a Unicode lowercase letter. For example, 'a' is lowercase. Returns true if getType() returns LOWERCASE_LETTER.
lowercase = [Ll]

Parameters: ch character to test

Returns: true if ch is a Unicode lowercase letter, else false

See Also: Character Character Character Character

Determines if a character is a Unicode lowercase letter. For example, 'a' is lowercase. Returns true if getType() returns LOWERCASE_LETTER.
lowercase = [Ll]

Parameters: codePoint character to test

Returns: true if ch is a Unicode lowercase letter, else false

Since: 1.5

See Also: Character Character Character

Return true if the given character is a low surrogate.

Parameters: ch the character

Returns: true if the character is a low surrogate character

Since: 1.5

Determines whether the character is mirrored according to Unicode. For example, ( (LEFT PARENTHESIS) appears as '(' in left-to-right text, but ')' in right-to-left text.

Parameters: ch the character to look up

Returns: true if the character is mirrored

Since: 1.4

Determines whether the character is mirrored according to Unicode. For example, ( (LEFT PARENTHESIS) appears as '(' in left-to-right text, but ')' in right-to-left text.

Parameters: codePoint the character to look up

Returns: true if the character is mirrored

Since: 1.5

Deprecated: Replaced by {@link #isWhitespace(char)}

Determines if a character is a ISO-LATIN-1 space. This is only the five characters '\t', '\n', '\f', '\r', and ' '.
Java space = U+0020|U+0009|U+000A|U+000C|U+000D

Parameters: ch character to test

Returns: true if ch is a space, else false

See Also: Character Character

Determines if a character is a Unicode space character. This includes SPACE_SEPARATOR, LINE_SEPARATOR, and PARAGRAPH_SEPARATOR.
Unicode space = [Zs]|[Zp]|[Zl]

Parameters: ch character to test

Returns: true if ch is a Unicode space, else false

Since: 1.1

See Also: Character

Determines if a character is a Unicode space character. This includes SPACE_SEPARATOR, LINE_SEPARATOR, and PARAGRAPH_SEPARATOR.
Unicode space = [Zs]|[Zp]|[Zl]

Parameters: codePoint character to test

Returns: true if ch is a Unicode space, else false

Since: 1.5

See Also: Character

Determines whether the specified code point is in the range 0x10000 .. 0x10FFFF, i.e. the character is within the Unicode supplementary character range.

Parameters: codePoint a Unicode code point

Returns: true if code point is in supplementary range

Since: 1.5

Return true if the given characters compose a surrogate pair. This is true if the first character is a high surrogate and the second character is a low surrogate.

Parameters: ch1 the first character ch2 the first character

Returns: true if the characters compose a surrogate pair

Since: 1.5

Determines if a character is a Unicode titlecase letter. For example, the character "Lj" (Latin capital L with small letter j) is titlecase. True if getType() returns TITLECASE_LETTER.
titlecase = [Lt]

Parameters: ch character to test

Returns: true if ch is a Unicode titlecase letter, else false

See Also: Character Character Character Character

Determines if a character is a Unicode titlecase letter. For example, the character "Lj" (Latin capital L with small letter j) is titlecase. True if getType() returns TITLECASE_LETTER.
titlecase = [Lt]

Parameters: codePoint character to test

Returns: true if ch is a Unicode titlecase letter, else false

Since: 1.5

See Also: Character Character Character

Determines if a character can follow the first letter in a Unicode identifier. This includes letters, connecting punctuation, digits, numeric letters, combining marks, non-spacing marks, and isIdentifierIgnorable.
Unicode identifier extender = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nl]|[Mn]|[Mc]|[Nd]|[Pc]|[Cf]| |U+0000-U+0008|U+000E-U+001B|U+007F-U+009F

Parameters: ch character to test

Returns: true if ch can follow the first letter in a Unicode identifier

Since: 1.1

See Also: Character Character Character Character

Determines if a character can follow the first letter in a Unicode identifier. This includes letters, connecting punctuation, digits, numeric letters, combining marks, non-spacing marks, and isIdentifierIgnorable.
Unicode identifier extender = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nl]|[Mn]|[Mc]|[Nd]|[Pc]|[Cf]| |U+0000-U+0008|U+000E-U+001B|U+007F-U+009F

Parameters: codePoint character to test

Returns: true if ch can follow the first letter in a Unicode identifier

Since: 1.5

See Also: Character Character Character Character

Determines if a character can start a Unicode identifier. Only letters can start a Unicode identifier, but this includes characters in LETTER_NUMBER.
Unicode identifier start = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nl]

Parameters: ch character to test

Returns: true if ch can start a Unicode identifier, else false

Since: 1.1

See Also: Character Character Character

Determines if a character can start a Unicode identifier. Only letters can start a Unicode identifier, but this includes characters in LETTER_NUMBER.
Unicode identifier start = [Lu]|[Ll]|[Lt]|[Lm]|[Lo]|[Nl]

Parameters: codePoint character to test

Returns: true if ch can start a Unicode identifier, else false

Since: 1.5

See Also: Character Character Character

Determines if a character is a Unicode uppercase letter. For example, 'A' is uppercase. Returns true if getType() returns UPPERCASE_LETTER.
uppercase = [Lu]

Parameters: ch character to test

Returns: true if ch is a Unicode uppercase letter, else false

See Also: Character Character Character Character

Determines if a character is a Unicode uppercase letter. For example, 'A' is uppercase. Returns true if getType() returns UPPERCASE_LETTER.
uppercase = [Lu]

Parameters: codePoint character to test

Returns: true if ch is a Unicode uppercase letter, else false

Since: 1.5

See Also: Character Character Character

Determines whether the specified code point is in the range 0x0000 .. 0x10FFFF, i.e. it is a valid Unicode code point.

Parameters: codePoint a Unicode code point

Returns: true if code point is valid

Since: 1.5

Determines if a character is Java whitespace. This includes Unicode space characters (SPACE_SEPARATOR, LINE_SEPARATOR, and PARAGRAPH_SEPARATOR) except the non-breaking spaces (' ', ' ', and ' '); and these characters: ' ', ' ', '', '', ' ', '', '', '', and ''.
Java whitespace = ([Zs] not Nb)|[Zl]|[Zp]|U+0009-U+000D|U+001C-U+001F

Parameters: ch character to test

Returns: true if ch is Java whitespace, else false

Since: 1.1

See Also: Character

Determines if a character is Java whitespace. This includes Unicode space characters (SPACE_SEPARATOR, LINE_SEPARATOR, and PARAGRAPH_SEPARATOR) except the non-breaking spaces (' ', ' ', and ' '); and these characters: ' ', ' ', '', '', ' ', '', '', '', and ''.
Java whitespace = ([Zs] not Nb)|[Zl]|[Zp]|U+0009-U+000D|U+001C-U+001F

Parameters: codePoint character to test

Returns: true if ch is Java whitespace, else false

Since: 1.5

See Also: Character

Returns the index into the given CharSequence that is offset codePointOffset code points from index.

Parameters: seq the CharSequence index the start position in the CharSequence codePointOffset the number of code points offset from the start position

Returns: the index into the CharSequence that is codePointOffset code points offset from index

Throws: NullPointerException if seq is null IndexOutOfBoundsException if index is negative or greater than the length of the sequence. IndexOutOfBoundsException if codePointOffset is positive and the subsequence from index to the end of seq has fewer than codePointOffset code points IndexOutOfBoundsException if codePointOffset is negative and the subsequence from the start of seq to index has fewer than (-codePointOffset) code points

Since: 1.5

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

Parameters: a the char array start the start index of the subarray count the length of the subarray index the index to be offset codePointOffset the number of code points offset from index

Returns: the index into the char array

Throws: NullPointerException if a is null IndexOutOfBoundsException if start or count is negative or if start + count is greater than the length of the array IndexOutOfBoundsException if index is less than start or larger than start + count IndexOutOfBoundsException if codePointOffset is positive and the subarray from index to start + count - 1 has fewer than codePointOffset code points. IndexOutOfBoundsException if codePointOffset is negative and the subarray from start to index - 1 has fewer than (-codePointOffset) code points

Since: 1.5

Reverse the bytes in val.

Since: 1.5

Converts a unicode code point to a UTF-16 representation of that code point.

Parameters: codePoint the unicode code point

Returns: the UTF-16 representation of that code point

Throws: IllegalArgumentException if the code point is not a valid unicode code point

Since: 1.5

Converts a unicode code point to its UTF-16 representation.

Parameters: codePoint the unicode code point dst the target char array dstIndex the start index for the target

Returns: number of characters written to dst

Throws: IllegalArgumentException if codePoint is not a valid unicode code point NullPointerException if dst is null IndexOutOfBoundsException if dstIndex is not valid in dst or if the UTF-16 representation does not fit into dst

Since: 1.5

Given a valid surrogate pair, this returns the corresponding code point.

Parameters: high the high character of the pair low the low character of the pair

Returns: the corresponding code point

Since: 1.5

Converts a Unicode character into its lowercase equivalent mapping. If a mapping does not exist, then the character passed is returned. Note that isLowerCase(toLowerCase(ch)) does not always return true.

Parameters: ch character to convert to lowercase

Returns: lowercase mapping of ch, or ch if lowercase mapping does not exist

See Also: Character Character Character Character

Converts a Unicode character into its lowercase equivalent mapping. If a mapping does not exist, then the character passed is returned. Note that isLowerCase(toLowerCase(ch)) does not always return true.

Parameters: codePoint character to convert to lowercase

Returns: lowercase mapping of ch, or ch if lowercase mapping does not exist

Since: 1.5

See Also: Character Character Character

Converts the wrapped character into a String.

Returns: a String containing one character -- the wrapped character of this instance

Returns a String of length 1 representing the specified character.

Parameters: ch the character to convert

Returns: a String containing the character

Since: 1.4

Converts a Unicode character into its titlecase equivalent mapping. If a mapping does not exist, then the character passed is returned. Note that isTitleCase(toTitleCase(ch)) does not always return true.

Parameters: ch character to convert to titlecase

Returns: titlecase mapping of ch, or ch if titlecase mapping does not exist

See Also: Character Character Character

Converts a Unicode character into its titlecase equivalent mapping. If a mapping does not exist, then the character passed is returned. Note that isTitleCase(toTitleCase(ch)) does not always return true.

Parameters: codePoint character to convert to titlecase

Returns: titlecase mapping of ch, or ch if titlecase mapping does not exist

Since: 1.5

See Also: Character Character

Converts a Unicode character into its uppercase equivalent mapping. If a mapping does not exist, then the character passed is returned. Note that isUpperCase(toUpperCase(ch)) does not always return true.

Parameters: ch character to convert to uppercase

Returns: uppercase mapping of ch, or ch if uppercase mapping does not exist

See Also: Character Character Character Character

Converts a Unicode character into its uppercase equivalent mapping. If a mapping does not exist, then the character passed is returned. Note that isUpperCase(toUpperCase(ch)) does not always return true.

Parameters: codePoint character to convert to uppercase

Returns: uppercase mapping of ch, or ch if uppercase mapping does not exist

Since: 1.5

See Also: Character Character Character

Returns an Character object wrapping the value. In contrast to the Character constructor, this method will cache some values. It is used by boxing conversion.

Parameters: val the value to wrap

Returns: the Character

Since: 1.5