Character

BYTES

int BYTES

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

Constant Value: 2 (0x00000002)

COMBINING_SPACING_MARK

byte COMBINING_SPACING_MARK

General category "Mc" in the Unicode specification.

Constant Value: 8 (0x00000008)

CONNECTOR_PUNCTUATION

byte CONNECTOR_PUNCTUATION

General category "Pc" in the Unicode specification.

Constant Value: 23 (0x00000017)

CONTROL

byte CONTROL

General category "Cc" in the Unicode specification.

Constant Value: 15 (0x0000000f)

CURRENCY_SYMBOL

byte CURRENCY_SYMBOL

General category "Sc" in the Unicode specification.

Constant Value: 26 (0x0000001a)

DASH_PUNCTUATION

byte DASH_PUNCTUATION

General category "Pd" in the Unicode specification.

Constant Value: 20 (0x00000014)

DECIMAL_DIGIT_NUMBER

byte DECIMAL_DIGIT_NUMBER

General category "Nd" in the Unicode specification.

Constant Value: 9 (0x00000009)

DIRECTIONALITY_ARABIC_NUMBER

byte DIRECTIONALITY_ARABIC_NUMBER

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

Constant Value: 6 (0x00000006)

DIRECTIONALITY_BOUNDARY_NEUTRAL

byte DIRECTIONALITY_BOUNDARY_NEUTRAL

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

Constant Value: 9 (0x00000009)

DIRECTIONALITY_COMMON_NUMBER_SEPARATOR

byte DIRECTIONALITY_COMMON_NUMBER_SEPARATOR

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

Constant Value: 7 (0x00000007)

DIRECTIONALITY_EUROPEAN_NUMBER

byte DIRECTIONALITY_EUROPEAN_NUMBER

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

Constant Value: 3 (0x00000003)

DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR

byte DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR

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

Constant Value: 4 (0x00000004)

DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR

byte DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR

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

Constant Value: 5 (0x00000005)

DIRECTIONALITY_LEFT_TO_RIGHT

byte DIRECTIONALITY_LEFT_TO_RIGHT

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

Constant Value: 0 (0x00000000)

DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING

byte DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING

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

Constant Value: 14 (0x0000000e)

DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE

byte DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE

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

Constant Value: 15 (0x0000000f)

DIRECTIONALITY_NONSPACING_MARK

byte DIRECTIONALITY_NONSPACING_MARK

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

Constant Value: 8 (0x00000008)

DIRECTIONALITY_OTHER_NEUTRALS

byte DIRECTIONALITY_OTHER_NEUTRALS

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

Constant Value: 13 (0x0000000d)

DIRECTIONALITY_PARAGRAPH_SEPARATOR

byte DIRECTIONALITY_PARAGRAPH_SEPARATOR

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

Constant Value: 10 (0x0000000a)

DIRECTIONALITY_POP_DIRECTIONAL_FORMAT

byte DIRECTIONALITY_POP_DIRECTIONAL_FORMAT

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

Constant Value: 18 (0x00000012)

DIRECTIONALITY_RIGHT_TO_LEFT

byte DIRECTIONALITY_RIGHT_TO_LEFT

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

Constant Value: 1 (0x00000001)

DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC

byte DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC

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

Constant Value: 2 (0x00000002)

DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING

byte DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING

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

Constant Value: 16 (0x00000010)

DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE

byte DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE

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

Constant Value: 17 (0x00000011)

DIRECTIONALITY_SEGMENT_SEPARATOR

byte DIRECTIONALITY_SEGMENT_SEPARATOR

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

Constant Value: 11 (0x0000000b)

DIRECTIONALITY_UNDEFINED

byte DIRECTIONALITY_UNDEFINED

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

Constant Value: -1 (0xffffffff)

DIRECTIONALITY_WHITESPACE

byte DIRECTIONALITY_WHITESPACE

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

Constant Value: 12 (0x0000000c)

ENCLOSING_MARK

byte ENCLOSING_MARK

General category "Me" in the Unicode specification.

Constant Value: 7 (0x00000007)

END_PUNCTUATION

byte END_PUNCTUATION

General category "Pe" in the Unicode specification.

Constant Value: 22 (0x00000016)

FINAL_QUOTE_PUNCTUATION

byte FINAL_QUOTE_PUNCTUATION

General category "Pf" in the Unicode specification.

Constant Value: 30 (0x0000001e)

FORMAT

byte FORMAT

General category "Cf" in the Unicode specification.

Constant Value: 16 (0x00000010)

INITIAL_QUOTE_PUNCTUATION

byte INITIAL_QUOTE_PUNCTUATION

General category "Pi" in the Unicode specification.

Constant Value: 29 (0x0000001d)

LETTER_NUMBER

byte LETTER_NUMBER

General category "Nl" in the Unicode specification.

Constant Value: 10 (0x0000000a)

LINE_SEPARATOR

byte LINE_SEPARATOR

General category "Zl" in the Unicode specification.

Constant Value: 13 (0x0000000d)

LOWERCASE_LETTER

byte LOWERCASE_LETTER

General category "Ll" in the Unicode specification.

Constant Value: 2 (0x00000002)

MATH_SYMBOL

byte MATH_SYMBOL

General category "Sm" in the Unicode specification.

Constant Value: 25 (0x00000019)

MAX_CODE_POINT

int MAX_CODE_POINT

The maximum value of a Unicode code point, constant U+10FFFF.

Constant Value: 1114111 (0x0010ffff)

MAX_HIGH_SURROGATE

char MAX_HIGH_SURROGATE

The maximum value of a Unicode high-surrogate code unit in the UTF-16 encoding, constant '\uDBFF'. A high-surrogate is also known as a leading-surrogate.

Constant Value: 56319 (0x0000dbff)

MAX_LOW_SURROGATE

char MAX_LOW_SURROGATE

The maximum value of a Unicode low-surrogate code unit in the UTF-16 encoding, constant '\uDFFF'. A low-surrogate is also known as a trailing-surrogate.

Constant Value: 57343 (0x0000dfff)

MAX_RADIX

int MAX_RADIX

The maximum radix available for conversion to and from strings. The constant value of this field is the largest value permitted for the radix argument in radix-conversion methods such as the digit method, the forDigit method, and the toString method of class Integer.

Constant Value: 36 (0x00000024)

MAX_SURROGATE

char MAX_SURROGATE

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

Constant Value: 57343 (0x0000dfff)

MAX_VALUE

char MAX_VALUE

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

Constant Value: 65535 (0x0000ffff)

MIN_CODE_POINT

int MIN_CODE_POINT

The minimum value of a Unicode code point, constant U+0000.

Constant Value: 0 (0x00000000)

MIN_HIGH_SURROGATE

char MIN_HIGH_SURROGATE

The minimum value of a Unicode high-surrogate code unit in the UTF-16 encoding, constant '\uD800'. A high-surrogate is also known as a leading-surrogate.

Constant Value: 55296 (0x0000d800)

MIN_LOW_SURROGATE

char MIN_LOW_SURROGATE

The minimum value of a Unicode low-surrogate code unit in the UTF-16 encoding, constant '\uDC00'. A low-surrogate is also known as a trailing-surrogate.

Constant Value: 56320 (0x0000dc00)

MIN_RADIX

int MIN_RADIX

The minimum radix available for conversion to and from strings. The constant value of this field is the smallest value permitted for the radix argument in radix-conversion methods such as the digit method, the forDigit method, and the toString method of class Integer.

Constant Value: 2 (0x00000002)

MIN_SUPPLEMENTARY_CODE_POINT

int MIN_SUPPLEMENTARY_CODE_POINT

The minimum value of a Unicode supplementary code point, constant U+10000.

Constant Value: 65536 (0x00010000)

MIN_SURROGATE

char MIN_SURROGATE

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

Constant Value: 55296 (0x0000d800)

MIN_VALUE

char MIN_VALUE

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

Constant Value: 0 (0x00000000)

MODIFIER_LETTER

byte MODIFIER_LETTER

General category "Lm" in the Unicode specification.

Constant Value: 4 (0x00000004)

MODIFIER_SYMBOL

byte MODIFIER_SYMBOL

General category "Sk" in the Unicode specification.

Constant Value: 27 (0x0000001b)

NON_SPACING_MARK

byte NON_SPACING_MARK

General category "Mn" in the Unicode specification.

Constant Value: 6 (0x00000006)

OTHER_LETTER

byte OTHER_LETTER

General category "Lo" in the Unicode specification.

Constant Value: 5 (0x00000005)

OTHER_NUMBER

byte OTHER_NUMBER

General category "No" in the Unicode specification.

Constant Value: 11 (0x0000000b)

OTHER_PUNCTUATION

byte OTHER_PUNCTUATION

General category "Po" in the Unicode specification.

Constant Value: 24 (0x00000018)

OTHER_SYMBOL

byte OTHER_SYMBOL

General category "So" in the Unicode specification.

Constant Value: 28 (0x0000001c)

PARAGRAPH_SEPARATOR

byte PARAGRAPH_SEPARATOR

General category "Zp" in the Unicode specification.

Constant Value: 14 (0x0000000e)

PRIVATE_USE

byte PRIVATE_USE

General category "Co" in the Unicode specification.

Constant Value: 18 (0x00000012)

SIZE

int SIZE

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

Constant Value: 16 (0x00000010)

SPACE_SEPARATOR

byte SPACE_SEPARATOR

General category "Zs" in the Unicode specification.

Constant Value: 12 (0x0000000c)

START_PUNCTUATION

byte START_PUNCTUATION

General category "Ps" in the Unicode specification.

Constant Value: 21 (0x00000015)

SURROGATE

byte SURROGATE

General category "Cs" in the Unicode specification.

Constant Value: 19 (0x00000013)

TITLECASE_LETTER

byte TITLECASE_LETTER

General category "Lt" in the Unicode specification.

Constant Value: 3 (0x00000003)

UNASSIGNED

byte UNASSIGNED

General category "Cn" in the Unicode specification.

Constant Value: 0 (0x00000000)

UPPERCASE_LETTER

byte UPPERCASE_LETTER

General category "Lu" in the Unicode specification.

Constant Value: 1 (0x00000001)

TYPE

Class<Character> TYPE

The Class instance representing the primitive type char.

Character

Character (char value)

Constructs a newly allocated Character object that represents the specified char value.

charCount

int charCount (int codePoint)

Determines the number of char values needed to represent the specified character (Unicode code point). If the specified character is equal to or greater than 0x10000, then the method returns 2. Otherwise, the method returns 1.

This method doesn't validate the specified character to be a valid Unicode code point. The caller must validate the character value using isValidCodePoint if necessary.

charValue

char charValue ()

Returns the value of this Character object.

codePointAt

int codePointAt (char[] a, 
                int index, 
                int limit)

Returns the code point at the given index of the char array, where only array elements with index less than limit can be used. If the char value at the given index in the char array is in the high-surrogate range, the following index is less than the limit, and the char value at the following index is in the low-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the char value at the given index is returned.

codePointAt

int codePointAt (char[] a, 
                int index)

Returns the code point at the given index of the char array. If the char value at the given index in the char array is in the high-surrogate range, the following index is less than the length of the char array, and the char value at the following index is in the low-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the char value at the given index is returned.

codePointAt

int codePointAt (CharSequence seq, 
                int index)

Returns the code point at the given index of the CharSequence. If the char value at the given index in the CharSequence is in the high-surrogate range, the following index is less than the length of the CharSequence, and the char value at the following index is in the low-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the char value at the given index is returned.

codePointBefore

int codePointBefore (char[] a, 
                int index)

Returns the code point preceding the given index of the char array. If the char value at (index - 1) in the char array is in the low-surrogate range, (index - 2) is not negative, and the char value at (index - 2) in the char array is in the high-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the char value at (index - 1) is returned.

codePointBefore

int codePointBefore (CharSequence seq, 
                int index)

Returns the code point preceding the given index of the CharSequence. If the char value at (index - 1) in the CharSequence is in the low-surrogate range, (index - 2) is not negative, and the char value at (index - 2) in the CharSequence is in the high-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the char value at (index - 1) is returned.

codePointBefore

int codePointBefore (char[] a, 
                int index, 
                int start)

Returns the code point preceding the given index of the char array, where only array elements with index greater than or equal to start can be used. If the char value at (index - 1) in the char array is in the low-surrogate range, (index - 2) is not less than start, and the char value at (index - 2) in the char array is in the high-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the char value at (index - 1) is returned.

codePointCount

int codePointCount (CharSequence seq, 
                int beginIndex, 
                int endIndex)

Returns the number of Unicode code points in the text range of the specified char sequence. The text range begins at the specified beginIndex and extends to the char at index endIndex - 1. Thus the length (in chars) of the text range is endIndex-beginIndex. Unpaired surrogates within the text range count as one code point each.

codePointCount

int codePointCount (char[] a, 
                int offset, 
                int count)

Returns the number of Unicode code points in a subarray of the char array argument. The offset argument is the index of the first char of the subarray and the count argument specifies the length of the subarray in chars. Unpaired surrogates within the subarray count as one code point each.

compare

int compare (char x, 
                char y)

Compares two char values numerically. The value returned is identical to what would be returned by:

    Character.valueOf(x).compareTo(Character.valueOf(y))
 

compareTo

int compareTo (Character anotherCharacter)

Compares two Character objects numerically.

digit

int digit (int codePoint, 
                int radix)

Returns the numeric value of the specified character (Unicode code point) in the specified radix.

If the radix is not in the range MIN_RADIX ≤ radix ≤ MAX_RADIX or if the character is not a valid digit in the specified radix, -1 is returned. A character is a valid digit if at least one of the following is true:

• The method isDigit(codePoint) is true of the character and the Unicode decimal digit value of the character (or its single-character decomposition) is less than the specified radix. In this case the decimal digit value is returned.
• The character is one of the uppercase Latin letters 'A' through 'Z' and its code is less than radix + 'A' - 10. In this case, codePoint - 'A' + 10 is returned.
• The character is one of the lowercase Latin letters 'a' through 'z' and its code is less than radix + 'a' - 10. In this case, codePoint - 'a' + 10 is returned.
• The character is one of the fullwidth uppercase Latin letters A ('\uFF21') through Z ('\uFF3A') and its code is less than radix + '\uFF21' - 10. In this case, codePoint - '\uFF21' + 10 is returned.
• The character is one of the fullwidth lowercase Latin letters a ('\uFF41') through z ('\uFF5A') and its code is less than radix + '\uFF41'- 10. In this case, codePoint - '\uFF41' + 10 is returned.

digit

int digit (char ch, 
                int radix)

Returns the numeric value of the character ch in the specified radix.

If the radix is not in the range MIN_RADIX ≤ radix ≤ MAX_RADIX or if the value of ch is not a valid digit in the specified radix, -1 is returned. A character is a valid digit if at least one of the following is true:

• The method isDigit is true of the character and the Unicode decimal digit value of the character (or its single-character decomposition) is less than the specified radix. In this case the decimal digit value is returned.
• The character is one of the uppercase Latin letters 'A' through 'Z' and its code is less than radix + 'A' - 10. In this case, ch - 'A' + 10 is returned.
• The character is one of the lowercase Latin letters 'a' through 'z' and its code is less than radix + 'a' - 10. In this case, ch - 'a' + 10 is returned.
• The character is one of the fullwidth uppercase Latin letters A ('\uFF21') through Z ('\uFF3A') and its code is less than radix + '\uFF21' - 10. In this case, ch - '\uFF21' + 10 is returned.
• The character is one of the fullwidth lowercase Latin letters a ('\uFF41') through z ('\uFF5A') and its code is less than radix + '\uFF41' - 10. In this case, ch - '\uFF41' + 10 is returned.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the digit(int, int) method.

equals

boolean equals (Object obj)

Compares this object against the specified object. The result is true if and only if the argument is not null and is a Character object that represents the same char value as this object.

forDigit

char forDigit (int digit, 
                int radix)

Determines the character representation for a specific digit in the specified radix. If the value of radix is not a valid radix, or the value of digit is not a valid digit in the specified radix, the null character ('\u0000') is returned.

The radix argument is valid if it is greater than or equal to MIN_RADIX and less than or equal to MAX_RADIX. The digit argument is valid if 0 <= digit < radix.

If the digit is less than 10, then '0' + digit is returned. Otherwise, the value 'a' + digit - 10 is returned.

getDirectionality

byte getDirectionality (char ch)

Returns the Unicode directionality property for the given character. Character directionality is used to calculate the visual ordering of text. The directionality value of undefined char values is DIRECTIONALITY_UNDEFINED.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the getDirectionality(int) method.

getDirectionality

byte getDirectionality (int codePoint)

Returns the Unicode directionality property for the given character (Unicode code point). Character directionality is used to calculate the visual ordering of text. The directionality value of undefined character is DIRECTIONALITY_UNDEFINED.

getName

String getName (int codePoint)

Returns the Unicode name of the specified character codePoint, or null if the code point is unassigned.

Note: if the specified character is not assigned a name by the UnicodeData file (part of the Unicode Character Database maintained by the Unicode Consortium), the returned name is the same as the result of expression.

Character.UnicodeBlock.of(codePoint).toString().replace('_', ' ') + " " + Integer.toHexString(codePoint).toUpperCase(Locale.ENGLISH);

getNumericValue

int getNumericValue (int codePoint)

Returns the int value that the specified character (Unicode code point) represents. For example, the character '\u216C' (the Roman numeral fifty) will return an int with a value of 50.

The letters A-Z in their uppercase ('\u0041' through '\u005A'), lowercase ('\u0061' through '\u007A'), and full width variant ('\uFF21' through '\uFF3A' and '\uFF41' through '\uFF5A') forms have numeric values from 10 through 35. This is independent of the Unicode specification, which does not assign numeric values to these char values.

If the character does not have a numeric value, then -1 is returned. If the character has a numeric value that cannot be represented as a nonnegative integer (for example, a fractional value), then -2 is returned.

getNumericValue

int getNumericValue (char ch)

Returns the int value that the specified Unicode character represents. For example, the character '\u216C' (the roman numeral fifty) will return an int with a value of 50.

The letters A-Z in their uppercase ('\u0041' through '\u005A'), lowercase ('\u0061' through '\u007A'), and full width variant ('\uFF21' through '\uFF3A' and '\uFF41' through '\uFF5A') forms have numeric values from 10 through 35. This is independent of the Unicode specification, which does not assign numeric values to these char values.

If the character does not have a numeric value, then -1 is returned. If the character has a numeric value that cannot be represented as a nonnegative integer (for example, a fractional value), then -2 is returned.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the getNumericValue(int) method.

getType

int getType (char ch)

Returns a value indicating a character's general category.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the getType(int) method.

getType

int getType (int codePoint)

Returns a value indicating a character's general category.

hashCode

int hashCode (char value)

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

hashCode

int hashCode ()

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

highSurrogate

char highSurrogate (int codePoint)

Returns the leading surrogate (a high surrogate code unit) of the surrogate pair representing the specified supplementary character (Unicode code point) in the UTF-16 encoding. If the specified character is not a supplementary character, an unspecified char is returned.

If isSupplementaryCodePoint(x) is true, then isHighSurrogate(highSurrogate(x)) and toCodePoint(highSurrogate(x), lowSurrogate(x)) == x are also always true.

isAlphabetic

boolean isAlphabetic (int codePoint)

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

A character is considered to be alphabetic if its general category type, provided by getType(codePoint), is any of the following:

• UPPERCASE_LETTER
• LOWERCASE_LETTER
• TITLECASE_LETTER
• MODIFIER_LETTER
• OTHER_LETTER
• LETTER_NUMBER

isBmpCodePoint

boolean isBmpCodePoint (int codePoint)

Determines whether the specified character (Unicode code point) is in the Basic Multilingual Plane (BMP). Such code points can be represented using a single char.

isDefined

boolean isDefined (int codePoint)

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

A character is defined if at least one of the following is true:

• It has an entry in the UnicodeData file.
• It has a value in a range defined by the UnicodeData file.

isDefined

boolean isDefined (char ch)

Determines if a character is defined in Unicode.

A character is defined if at least one of the following is true:

• It has an entry in the UnicodeData file.
• It has a value in a range defined by the UnicodeData file.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isDefined(int) method.

isDigit

boolean isDigit (char ch)

Determines if the specified character is a digit.

A character is a digit if its general category type, provided by Character.getType(ch), is DECIMAL_DIGIT_NUMBER.

Some Unicode character ranges that contain digits:

• '\u0030' through '\u0039', ISO-LATIN-1 digits ('0' through '9')
• '\u0660' through '\u0669', Arabic-Indic digits
• '\u06F0' through '\u06F9', Extended Arabic-Indic digits
• '\u0966' through '\u096F', Devanagari digits
• '\uFF10' through '\uFF19', Fullwidth digits

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isDigit(int) method.

isDigit

boolean isDigit (int codePoint)

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

A character is a digit if its general category type, provided by getType(codePoint), is DECIMAL_DIGIT_NUMBER.

Some Unicode character ranges that contain digits:

• '\u0030' through '\u0039', ISO-LATIN-1 digits ('0' through '9')
• '\u0660' through '\u0669', Arabic-Indic digits
• '\u06F0' through '\u06F9', Extended Arabic-Indic digits
• '\u0966' through '\u096F', Devanagari digits
• '\uFF10' through '\uFF19', Fullwidth digits

isHighSurrogate

boolean isHighSurrogate (char ch)

Determines if the given char value is a Unicode high-surrogate code unit (also known as leading-surrogate code unit).

Such values do not represent characters by themselves, but are used in the representation of supplementary characters in the UTF-16 encoding.

isISOControl

boolean isISOControl (char ch)

Determines if the specified character is an ISO control character. A character is considered to be an ISO control character if its code is in the range '\u0000' through '\u001F' or in the range '\u007F' through '\u009F'.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isISOControl(int) method.

isISOControl

boolean isISOControl (int codePoint)

Determines if the referenced character (Unicode code point) is an ISO control character. A character is considered to be an ISO control character if its code is in the range '\u0000' through '\u001F' or in the range '\u007F' through '\u009F'.

isIdentifierIgnorable

boolean isIdentifierIgnorable (char ch)

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

The following Unicode characters are ignorable in a Java identifier or a Unicode identifier:

• ISO control characters that are not whitespace
  • '\u0000' through '\u0008'
  • '\u000E' through '\u001B'
  • '\u007F' through '\u009F'
• all characters that have the FORMAT general category value

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isIdentifierIgnorable(int) method.

isIdentifierIgnorable

boolean isIdentifierIgnorable (int codePoint)

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

The following Unicode characters are ignorable in a Java identifier or a Unicode identifier:

• ISO control characters that are not whitespace
  • '\u0000' through '\u0008'
  • '\u000E' through '\u001B'
  • '\u007F' through '\u009F'
• all characters that have the FORMAT general category value

isIdeographic

boolean isIdeographic (int codePoint)

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

isJavaIdentifierPart

boolean isJavaIdentifierPart (char ch)

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

A character may be part of a Java identifier if any of the following are true:

• it is a letter
• it is a currency symbol (such as '$')
• it is a connecting punctuation character (such as '_')
• it is a digit
• it is a numeric letter (such as a Roman numeral character)
• it is a combining mark
• it is a non-spacing mark
• isIdentifierIgnorable returns true for the character

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isJavaIdentifierPart(int) method.

isJavaIdentifierPart

boolean isJavaIdentifierPart (int codePoint)

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

A character may be part of a Java identifier if any of the following are true:

• it is a letter
• it is a currency symbol (such as '$')
• it is a connecting punctuation character (such as '_')
• it is a digit
• it is a numeric letter (such as a Roman numeral character)
• it is a combining mark
• it is a non-spacing mark
• isIdentifierIgnorable(codePoint) returns true for the character

isJavaIdentifierStart

boolean isJavaIdentifierStart (int codePoint)

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

A character may start a Java identifier if and only if one of the following conditions is true:

• isLetter(codePoint) returns true
• getType(codePoint) returns LETTER_NUMBER
• the referenced character is a currency symbol (such as '$')
• the referenced character is a connecting punctuation character (such as '_').

isJavaIdentifierStart

boolean isJavaIdentifierStart (char ch)

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

A character may start a Java identifier if and only if one of the following conditions is true:

• isLetter(ch) returns true
• getType(ch) returns LETTER_NUMBER
• ch is a currency symbol (such as '$')
• ch is a connecting punctuation character (such as '_').

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isJavaIdentifierStart(int) method.

isJavaLetter

boolean isJavaLetter (char ch)

This method was deprecated in API level 1.
Replaced by isJavaIdentifierStart(char).

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

A character may start a Java identifier if and only if one of the following is true:

• isLetter(ch) returns true
• getType(ch) returns LETTER_NUMBER
• ch is a currency symbol (such as '$')
• ch is a connecting punctuation character (such as '_').

isJavaLetterOrDigit

boolean isJavaLetterOrDigit (char ch)

This method was deprecated in API level 1.
Replaced by isJavaIdentifierPart(char).

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

A character may be part of a Java identifier if and only if any of the following are true:

• it is a letter
• it is a currency symbol (such as '$')
• it is a connecting punctuation character (such as '_')
• it is a digit
• it is a numeric letter (such as a Roman numeral character)
• it is a combining mark
• it is a non-spacing mark
• isIdentifierIgnorable returns true for the character.

isLetter

boolean isLetter (char ch)

Determines if the specified character is a letter.

A character is considered to be a letter if its general category type, provided by Character.getType(ch), is any of the following:

• UPPERCASE_LETTER
• LOWERCASE_LETTER
• TITLECASE_LETTER
• MODIFIER_LETTER
• OTHER_LETTER

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isLetter(int) method.

isLetter

boolean isLetter (int codePoint)

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

A character is considered to be a letter if its general category type, provided by getType(codePoint), is any of the following:

• UPPERCASE_LETTER
• LOWERCASE_LETTER
• TITLECASE_LETTER
• MODIFIER_LETTER
• OTHER_LETTER

isLetterOrDigit

boolean isLetterOrDigit (char ch)

Determines if the specified character is a letter or digit.

A character is considered to be a letter or digit if either Character.isLetter(char ch) or Character.isDigit(char ch) returns true for the character.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isLetterOrDigit(int) method.

isLetterOrDigit

boolean isLetterOrDigit (int codePoint)

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

A character is considered to be a letter or digit if either isLetter(codePoint) or isDigit(codePoint) returns true for the character.

isLowSurrogate

boolean isLowSurrogate (char ch)

Determines if the given char value is a Unicode low-surrogate code unit (also known as trailing-surrogate code unit).

Such values do not represent characters by themselves, but are used in the representation of supplementary characters in the UTF-16 encoding.

isLowerCase

boolean isLowerCase (char ch)

Determines if the specified character is a lowercase character.

A character is lowercase if its general category type, provided by Character.getType(ch), is LOWERCASE_LETTER, or it has contributory property Other_Lowercase as defined by the Unicode Standard.

The following are examples of lowercase characters:

 a b c d e f g h i j k l m n o p q r s t u v w x y z
 '\u00DF' '\u00E0' '\u00E1' '\u00E2' '\u00E3' '\u00E4' '\u00E5' '\u00E6'
 '\u00E7' '\u00E8' '\u00E9' '\u00EA' '\u00EB' '\u00EC' '\u00ED' '\u00EE'
 '\u00EF' '\u00F0' '\u00F1' '\u00F2' '\u00F3' '\u00F4' '\u00F5' '\u00F6'
 '\u00F8' '\u00F9' '\u00FA' '\u00FB' '\u00FC' '\u00FD' '\u00FE' '\u00FF'
 

Many other Unicode characters are lowercase too.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isLowerCase(int) method.

isLowerCase

boolean isLowerCase (int codePoint)

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

A character is lowercase if its general category type, provided by getType(codePoint), is LOWERCASE_LETTER, or it has contributory property Other_Lowercase as defined by the Unicode Standard.

The following are examples of lowercase characters:

 a b c d e f g h i j k l m n o p q r s t u v w x y z
 '\u00DF' '\u00E0' '\u00E1' '\u00E2' '\u00E3' '\u00E4' '\u00E5' '\u00E6'
 '\u00E7' '\u00E8' '\u00E9' '\u00EA' '\u00EB' '\u00EC' '\u00ED' '\u00EE'
 '\u00EF' '\u00F0' '\u00F1' '\u00F2' '\u00F3' '\u00F4' '\u00F5' '\u00F6'
 '\u00F8' '\u00F9' '\u00FA' '\u00FB' '\u00FC' '\u00FD' '\u00FE' '\u00FF'
 

Many other Unicode characters are lowercase too.

isMirrored

boolean isMirrored (int codePoint)

Determines whether the specified character (Unicode code point) is mirrored according to the Unicode specification. Mirrored characters should have their glyphs horizontally mirrored when displayed in text that is right-to-left. For example, '\u0028' LEFT PARENTHESIS is semantically defined to be an opening parenthesis. This will appear as a "(" in text that is left-to-right but as a ")" in text that is right-to-left.

isMirrored

boolean isMirrored (char ch)

Determines whether the character is mirrored according to the Unicode specification. Mirrored characters should have their glyphs horizontally mirrored when displayed in text that is right-to-left. For example, '\u0028' LEFT PARENTHESIS is semantically defined to be an opening parenthesis. This will appear as a "(" in text that is left-to-right but as a ")" in text that is right-to-left.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isMirrored(int) method.

isSpace

boolean isSpace (char ch)

This method was deprecated in API level 1.
Replaced by isWhitespace(char).

Determines if the specified character is ISO-LATIN-1 white space. This method returns true for the following five characters only:

isSpaceChar

boolean isSpaceChar (char ch)

Determines if the specified character is a Unicode space character. A character is considered to be a space character if and only if it is specified to be a space character by the Unicode Standard. This method returns true if the character's general category type is any of the following:

• SPACE_SEPARATOR
• LINE_SEPARATOR
• PARAGRAPH_SEPARATOR

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isSpaceChar(int) method.

isSpaceChar

boolean isSpaceChar (int codePoint)

Determines if the specified character (Unicode code point) is a Unicode space character. A character is considered to be a space character if and only if it is specified to be a space character by the Unicode Standard. This method returns true if the character's general category type is any of the following:

• SPACE_SEPARATOR
• LINE_SEPARATOR
• PARAGRAPH_SEPARATOR

isSupplementaryCodePoint

boolean isSupplementaryCodePoint (int codePoint)

Determines whether the specified character (Unicode code point) is in the supplementary character range.

isSurrogate

boolean isSurrogate (char ch)

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

Such values do not represent characters by themselves, but are used in the representation of supplementary characters in the UTF-16 encoding.

A char value is a surrogate code unit if and only if it is either a low-surrogate code unit or a high-surrogate code unit.

isSurrogatePair

boolean isSurrogatePair (char high, 
                char low)

Determines whether the specified pair of char values is a valid Unicode surrogate pair.

This method is equivalent to the expression:

 isHighSurrogate(high) && isLowSurrogate(low)
 

isTitleCase

boolean isTitleCase (int codePoint)

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

A character is a titlecase character if its general category type, provided by getType(codePoint), is TITLECASE_LETTER.

Some characters look like pairs of Latin letters. For example, there is an uppercase letter that looks like "LJ" and has a corresponding lowercase letter that looks like "lj". A third form, which looks like "Lj", is the appropriate form to use when rendering a word in lowercase with initial capitals, as for a book title.

These are some of the Unicode characters for which this method returns true:

• LATIN CAPITAL LETTER D WITH SMALL LETTER Z WITH CARON
• LATIN CAPITAL LETTER L WITH SMALL LETTER J
• LATIN CAPITAL LETTER N WITH SMALL LETTER J
• LATIN CAPITAL LETTER D WITH SMALL LETTER Z

Many other Unicode characters are titlecase too.

isTitleCase

boolean isTitleCase (char ch)

Determines if the specified character is a titlecase character.

A character is a titlecase character if its general category type, provided by Character.getType(ch), is TITLECASE_LETTER.

Some characters look like pairs of Latin letters. For example, there is an uppercase letter that looks like "LJ" and has a corresponding lowercase letter that looks like "lj". A third form, which looks like "Lj", is the appropriate form to use when rendering a word in lowercase with initial capitals, as for a book title.

These are some of the Unicode characters for which this method returns true:

• LATIN CAPITAL LETTER D WITH SMALL LETTER Z WITH CARON
• LATIN CAPITAL LETTER L WITH SMALL LETTER J
• LATIN CAPITAL LETTER N WITH SMALL LETTER J
• LATIN CAPITAL LETTER D WITH SMALL LETTER Z

Many other Unicode characters are titlecase too.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isTitleCase(int) method.

isUnicodeIdentifierPart

boolean isUnicodeIdentifierPart (int codePoint)

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

A character may be part of a Unicode identifier if and only if one of the following statements is true:

• it is a letter
• it is a connecting punctuation character (such as '_')
• it is a digit
• it is a numeric letter (such as a Roman numeral character)
• it is a combining mark
• it is a non-spacing mark
• isIdentifierIgnorable returns true for this character.

isUnicodeIdentifierPart

boolean isUnicodeIdentifierPart (char ch)

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

A character may be part of a Unicode identifier if and only if one of the following statements is true:

• it is a letter
• it is a connecting punctuation character (such as '_')
• it is a digit
• it is a numeric letter (such as a Roman numeral character)
• it is a combining mark
• it is a non-spacing mark
• isIdentifierIgnorable returns true for this character.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isUnicodeIdentifierPart(int) method.

isUnicodeIdentifierStart

boolean isUnicodeIdentifierStart (int codePoint)

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

A character may start a Unicode identifier if and only if one of the following conditions is true:

• isLetter(codePoint) returns true
• getType(codePoint) returns LETTER_NUMBER.

isUnicodeIdentifierStart

boolean isUnicodeIdentifierStart (char ch)

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

A character may start a Unicode identifier if and only if one of the following conditions is true:

• isLetter(ch) returns true
• getType(ch) returns LETTER_NUMBER.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isUnicodeIdentifierStart(int) method.

isUpperCase

boolean isUpperCase (char ch)

Determines if the specified character is an uppercase character.

A character is uppercase if its general category type, provided by Character.getType(ch), is UPPERCASE_LETTER. or it has contributory property Other_Uppercase as defined by the Unicode Standard.

The following are examples of uppercase characters:

 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 '\u00C0' '\u00C1' '\u00C2' '\u00C3' '\u00C4' '\u00C5' '\u00C6' '\u00C7'
 '\u00C8' '\u00C9' '\u00CA' '\u00CB' '\u00CC' '\u00CD' '\u00CE' '\u00CF'
 '\u00D0' '\u00D1' '\u00D2' '\u00D3' '\u00D4' '\u00D5' '\u00D6' '\u00D8'
 '\u00D9' '\u00DA' '\u00DB' '\u00DC' '\u00DD' '\u00DE'
 

Many other Unicode characters are uppercase too.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isUpperCase(int) method.

isUpperCase

boolean isUpperCase (int codePoint)

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

A character is uppercase if its general category type, provided by getType(codePoint), is UPPERCASE_LETTER, or it has contributory property Other_Uppercase as defined by the Unicode Standard.

The following are examples of uppercase characters:

 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 '\u00C0' '\u00C1' '\u00C2' '\u00C3' '\u00C4' '\u00C5' '\u00C6' '\u00C7'
 '\u00C8' '\u00C9' '\u00CA' '\u00CB' '\u00CC' '\u00CD' '\u00CE' '\u00CF'
 '\u00D0' '\u00D1' '\u00D2' '\u00D3' '\u00D4' '\u00D5' '\u00D6' '\u00D8'
 '\u00D9' '\u00DA' '\u00DB' '\u00DC' '\u00DD' '\u00DE'
 

Many other Unicode characters are uppercase too.

isValidCodePoint

boolean isValidCodePoint (int codePoint)

Determines whether the specified code point is a valid Unicode code point value.

isWhitespace

boolean isWhitespace (int codePoint)

Determines if the specified character (Unicode code point) is white space according to Java. A character is a Java whitespace character if and only if it satisfies one of the following criteria:

• It is a Unicode space character (SPACE_SEPARATOR, LINE_SEPARATOR, or PARAGRAPH_SEPARATOR) but is not also a non-breaking space ('\u00A0', '\u2007', '\u202F').
• It is '\t', U+0009 HORIZONTAL TABULATION.
• It is '\n', U+000A LINE FEED.
• It is '\u000B', U+000B VERTICAL TABULATION.
• It is '\f', U+000C FORM FEED.
• It is '\r', U+000D CARRIAGE RETURN.
• It is '\u001C', U+001C FILE SEPARATOR.
• It is '\u001D', U+001D GROUP SEPARATOR.
• It is '\u001E', U+001E RECORD SEPARATOR.
• It is '\u001F', U+001F UNIT SEPARATOR.

isWhitespace

boolean isWhitespace (char ch)

Determines if the specified character is white space according to Java. A character is a Java whitespace character if and only if it satisfies one of the following criteria:

• It is a Unicode space character (SPACE_SEPARATOR, LINE_SEPARATOR, or PARAGRAPH_SEPARATOR) but is not also a non-breaking space ('\u00A0', '\u2007', '\u202F').
• It is '\t', U+0009 HORIZONTAL TABULATION.
• It is '\n', U+000A LINE FEED.
• It is '\u000B', U+000B VERTICAL TABULATION.
• It is '\f', U+000C FORM FEED.
• It is '\r', U+000D CARRIAGE RETURN.
• It is '\u001C', U+001C FILE SEPARATOR.
• It is '\u001D', U+001D GROUP SEPARATOR.
• It is '\u001E', U+001E RECORD SEPARATOR.
• It is '\u001F', U+001F UNIT SEPARATOR.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isWhitespace(int) method.

lowSurrogate

char lowSurrogate (int codePoint)

Returns the trailing surrogate (a low surrogate code unit) of the surrogate pair representing the specified supplementary character (Unicode code point) in the UTF-16 encoding. If the specified character is not a supplementary character, an unspecified char is returned.

If isSupplementaryCodePoint(x) is true, then isLowSurrogate(lowSurrogate(x)) and toCodePoint(highSurrogate(x), lowSurrogate(x)) == x are also always true.

offsetByCodePoints

int offsetByCodePoints (CharSequence seq, 
                int index, 
                int codePointOffset)

Returns the index within the given char sequence that is offset from the given index by codePointOffset code points. Unpaired surrogates within the text range given by index and codePointOffset count as one code point each.

offsetByCodePoints

int offsetByCodePoints (char[] a, 
                int start, 
                int count, 
                int index, 
                int codePointOffset)

Returns the index within the given char subarray that is offset from the given index by codePointOffset code points. The start and count arguments specify a subarray of the char array. Unpaired surrogates within the text range given by index and codePointOffset count as one code point each.

reverseBytes

char reverseBytes (char ch)

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

toChars

int toChars (int codePoint, 
                char[] dst, 
                int dstIndex)

Converts the specified character (Unicode code point) to its UTF-16 representation. If the specified code point is a BMP (Basic Multilingual Plane or Plane 0) value, the same value is stored in dst[dstIndex], and 1 is returned. If the specified code point is a supplementary character, its surrogate values are stored in dst[dstIndex] (high-surrogate) and dst[dstIndex+1] (low-surrogate), and 2 is returned.

toChars

char[] toChars (int codePoint)

Converts the specified character (Unicode code point) to its UTF-16 representation stored in a char array. If the specified code point is a BMP (Basic Multilingual Plane or Plane 0) value, the resulting char array has the same value as codePoint. If the specified code point is a supplementary code point, the resulting char array has the corresponding surrogate pair.

toCodePoint

int toCodePoint (char high, 
                char low)

Converts the specified surrogate pair to its supplementary code point value. This method does not validate the specified surrogate pair. The caller must validate it using isSurrogatePair if necessary.

toLowerCase

int toLowerCase (int codePoint)

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

Note that Character.isLowerCase(Character.toLowerCase(codePoint)) does not always return true for some ranges of characters, particularly those that are symbols or ideographs.

In general, toLowerCase() should be used to map characters to lowercase. String case mapping methods have several benefits over Character case mapping methods. String case mapping methods can perform locale-sensitive mappings, context-sensitive mappings, and 1:M character mappings, whereas the Character case mapping methods cannot.

toLowerCase

char toLowerCase (char ch)

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

Note that Character.isLowerCase(Character.toLowerCase(ch)) does not always return true for some ranges of characters, particularly those that are symbols or ideographs.

In general, toLowerCase() should be used to map characters to lowercase. String case mapping methods have several benefits over Character case mapping methods. String case mapping methods can perform locale-sensitive mappings, context-sensitive mappings, and 1:M character mappings, whereas the Character case mapping methods cannot.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the toLowerCase(int) method.

toString

String toString ()

Returns a String object representing this Character's value. The result is a string of length 1 whose sole component is the primitive char value represented by this Character object.

toString

String toString (char c)

Returns a String object representing the specified char. The result is a string of length 1 consisting solely of the specified char.

toTitleCase

char toTitleCase (char ch)

Converts the character argument to titlecase using case mapping information from the UnicodeData file. If a character has no explicit titlecase mapping and is not itself a titlecase char according to UnicodeData, then the uppercase mapping is returned as an equivalent titlecase mapping. If the char argument is already a titlecase char, the same char value will be returned.

Note that Character.isTitleCase(Character.toTitleCase(ch)) does not always return true for some ranges of characters.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the toTitleCase(int) method.

toTitleCase

int toTitleCase (int codePoint)

Converts the character (Unicode code point) argument to titlecase using case mapping information from the UnicodeData file. If a character has no explicit titlecase mapping and is not itself a titlecase char according to UnicodeData, then the uppercase mapping is returned as an equivalent titlecase mapping. If the character argument is already a titlecase character, the same character value will be returned.

Note that Character.isTitleCase(Character.toTitleCase(codePoint)) does not always return true for some ranges of characters.

toUpperCase

char toUpperCase (char ch)

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

Note that Character.isUpperCase(Character.toUpperCase(ch)) does not always return true for some ranges of characters, particularly those that are symbols or ideographs.

In general, toUpperCase() should be used to map characters to uppercase. String case mapping methods have several benefits over Character case mapping methods. String case mapping methods can perform locale-sensitive mappings, context-sensitive mappings, and 1:M character mappings, whereas the Character case mapping methods cannot.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the toUpperCase(int) method.

toUpperCase

int toUpperCase (int codePoint)

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

Note that Character.isUpperCase(Character.toUpperCase(codePoint)) does not always return true for some ranges of characters, particularly those that are symbols or ideographs.

In general, toUpperCase() should be used to map characters to uppercase. String case mapping methods have several benefits over Character case mapping methods. String case mapping methods can perform locale-sensitive mappings, context-sensitive mappings, and 1:M character mappings, whereas the Character case mapping methods cannot.

valueOf

Character valueOf (char c)

Returns a Character instance representing the specified char value. If a new Character instance is not required, this method should generally be used in preference to the constructor Character(char), as this method is likely to yield significantly better space and time performance by caching frequently requested values. This method will always cache values in the range '\u0000' to '\u007F', inclusive, and may cache other values outside of this range.