Character

BYTES

static val BYTES: Int

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

Value: 2

COMBINING_SPACING_MARK

static val COMBINING_SPACING_MARK: Byte

General category "Mc" in the Unicode specification.

Value: 8

CONNECTOR_PUNCTUATION

static val CONNECTOR_PUNCTUATION: Byte

General category "Pc" in the Unicode specification.

Value: 23

CONTROL

static val CONTROL: Byte

General category "Cc" in the Unicode specification.

Value: 15

CURRENCY_SYMBOL

static val CURRENCY_SYMBOL: Byte

General category "Sc" in the Unicode specification.

Value: 26

DASH_PUNCTUATION

static val DASH_PUNCTUATION: Byte

General category "Pd" in the Unicode specification.

Value: 20

DECIMAL_DIGIT_NUMBER

static val DECIMAL_DIGIT_NUMBER: Byte

General category "Nd" in the Unicode specification.

Value: 9

DIRECTIONALITY_ARABIC_NUMBER

static val DIRECTIONALITY_ARABIC_NUMBER: Byte

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

Value: 6

DIRECTIONALITY_BOUNDARY_NEUTRAL

static val DIRECTIONALITY_BOUNDARY_NEUTRAL: Byte

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

Value: 9

DIRECTIONALITY_COMMON_NUMBER_SEPARATOR

static val DIRECTIONALITY_COMMON_NUMBER_SEPARATOR: Byte

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

Value: 7

DIRECTIONALITY_EUROPEAN_NUMBER

static val DIRECTIONALITY_EUROPEAN_NUMBER: Byte

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

Value: 3

DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR

static val DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR: Byte

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

Value: 4

DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR

static val DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR: Byte

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

Value: 5

DIRECTIONALITY_FIRST_STRONG_ISOLATE

static val DIRECTIONALITY_FIRST_STRONG_ISOLATE: Byte

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

Value: 21

DIRECTIONALITY_LEFT_TO_RIGHT

static val DIRECTIONALITY_LEFT_TO_RIGHT: Byte

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

Value: 0

DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING

static val DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING: Byte

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

Value: 14

DIRECTIONALITY_LEFT_TO_RIGHT_ISOLATE

static val DIRECTIONALITY_LEFT_TO_RIGHT_ISOLATE: Byte

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

Value: 19

DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE

static val DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE: Byte

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

Value: 15

DIRECTIONALITY_NONSPACING_MARK

static val DIRECTIONALITY_NONSPACING_MARK: Byte

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

Value: 8

DIRECTIONALITY_OTHER_NEUTRALS

static val DIRECTIONALITY_OTHER_NEUTRALS: Byte

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

Value: 13

DIRECTIONALITY_PARAGRAPH_SEPARATOR

static val DIRECTIONALITY_PARAGRAPH_SEPARATOR: Byte

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

Value: 10

DIRECTIONALITY_POP_DIRECTIONAL_FORMAT

static val DIRECTIONALITY_POP_DIRECTIONAL_FORMAT: Byte

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

Value: 18

DIRECTIONALITY_POP_DIRECTIONAL_ISOLATE

static val DIRECTIONALITY_POP_DIRECTIONAL_ISOLATE: Byte

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

Value: 22

DIRECTIONALITY_RIGHT_TO_LEFT

static val DIRECTIONALITY_RIGHT_TO_LEFT: Byte

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

Value: 1

DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC

static val DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC: Byte

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

Value: 2

DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING

static val DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING: Byte

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

Value: 16

DIRECTIONALITY_RIGHT_TO_LEFT_ISOLATE

static val DIRECTIONALITY_RIGHT_TO_LEFT_ISOLATE: Byte

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

Value: 20

DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE

static val DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE: Byte

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

Value: 17

DIRECTIONALITY_SEGMENT_SEPARATOR

static val DIRECTIONALITY_SEGMENT_SEPARATOR: Byte

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

Value: 11

DIRECTIONALITY_UNDEFINED

static val DIRECTIONALITY_UNDEFINED: Byte

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

Value: -1

DIRECTIONALITY_WHITESPACE

static val DIRECTIONALITY_WHITESPACE: Byte

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

Value: 12

ENCLOSING_MARK

static val ENCLOSING_MARK: Byte

General category "Me" in the Unicode specification.

Value: 7

END_PUNCTUATION

static val END_PUNCTUATION: Byte

General category "Pe" in the Unicode specification.

Value: 22

FINAL_QUOTE_PUNCTUATION

static val FINAL_QUOTE_PUNCTUATION: Byte

General category "Pf" in the Unicode specification.

Value: 30

FORMAT

static val FORMAT: Byte

General category "Cf" in the Unicode specification.

Value: 16

INITIAL_QUOTE_PUNCTUATION

static val INITIAL_QUOTE_PUNCTUATION: Byte

General category "Pi" in the Unicode specification.

Value: 29

LETTER_NUMBER

static val LETTER_NUMBER: Byte

General category "Nl" in the Unicode specification.

Value: 10

LINE_SEPARATOR

static val LINE_SEPARATOR: Byte

General category "Zl" in the Unicode specification.

Value: 13

LOWERCASE_LETTER

static val LOWERCASE_LETTER: Byte

General category "Ll" in the Unicode specification.

Value: 2

MATH_SYMBOL

static val MATH_SYMBOL: Byte

General category "Sm" in the Unicode specification.

Value: 25

MAX_CODE_POINT

static val MAX_CODE_POINT: Int

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

Value: 1114111

MAX_HIGH_SURROGATE

static val MAX_HIGH_SURROGATE: Char

The maximum value of a Unicode high-surrogate code unit in the UTF-16 encoding, constant '\u005CuDBFF'. A high-surrogate is also known as a leading-surrogate.

Value: 56319

MAX_LOW_SURROGATE

static val MAX_LOW_SURROGATE: Char

The maximum value of a Unicode low-surrogate code unit in the UTF-16 encoding, constant '\u005CuDFFF'. A low-surrogate is also known as a trailing-surrogate.

Value: 57343

MAX_RADIX

static val MAX_RADIX: Int

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.

Value: 36

MAX_SURROGATE

static val MAX_SURROGATE: Char

The maximum value of a Unicode surrogate code unit in the UTF-16 encoding, constant '\u005CuDFFF'.

Value: 57343

MAX_VALUE

static val MAX_VALUE: Char

The constant value of this field is the largest value of type char, '\u005CuFFFF'.

Value: 65535

MIN_CODE_POINT

static val MIN_CODE_POINT: Int

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

Value: 0

MIN_HIGH_SURROGATE

static val MIN_HIGH_SURROGATE: Char

The minimum value of a Unicode high-surrogate code unit in the UTF-16 encoding, constant '\u005CuD800'. A high-surrogate is also known as a leading-surrogate.

Value: 55296

MIN_LOW_SURROGATE

static val MIN_LOW_SURROGATE: Char

The minimum value of a Unicode low-surrogate code unit in the UTF-16 encoding, constant '\u005CuDC00'. A low-surrogate is also known as a trailing-surrogate.

Value: 56320

MIN_RADIX

static val MIN_RADIX: Int

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.

Value: 2

MIN_SUPPLEMENTARY_CODE_POINT

static val MIN_SUPPLEMENTARY_CODE_POINT: Int

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

Value: 65536

MIN_SURROGATE

static val MIN_SURROGATE: Char

The minimum value of a Unicode surrogate code unit in the UTF-16 encoding, constant '\u005CuD800'.

Value: 55296

MIN_VALUE

static val MIN_VALUE: Char

The constant value of this field is the smallest value of type char, '\u005Cu0000'.

Value: 0

MODIFIER_LETTER

static val MODIFIER_LETTER: Byte

General category "Lm" in the Unicode specification.

Value: 4

MODIFIER_SYMBOL

static val MODIFIER_SYMBOL: Byte

General category "Sk" in the Unicode specification.

Value: 27

NON_SPACING_MARK

static val NON_SPACING_MARK: Byte

General category "Mn" in the Unicode specification.

Value: 6

OTHER_LETTER

static val OTHER_LETTER: Byte

General category "Lo" in the Unicode specification.

Value: 5

OTHER_NUMBER

static val OTHER_NUMBER: Byte

General category "No" in the Unicode specification.

Value: 11

OTHER_PUNCTUATION

static val OTHER_PUNCTUATION: Byte

General category "Po" in the Unicode specification.

Value: 24

OTHER_SYMBOL

static val OTHER_SYMBOL: Byte

General category "So" in the Unicode specification.

Value: 28

PARAGRAPH_SEPARATOR

static val PARAGRAPH_SEPARATOR: Byte

General category "Zp" in the Unicode specification.

Value: 14

PRIVATE_USE

static val PRIVATE_USE: Byte

General category "Co" in the Unicode specification.

Value: 18

SIZE

static val SIZE: Int

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

Value: 16

SPACE_SEPARATOR

static val SPACE_SEPARATOR: Byte

General category "Zs" in the Unicode specification.

Value: 12

START_PUNCTUATION

static val START_PUNCTUATION: Byte

General category "Ps" in the Unicode specification.

Value: 21

SURROGATE

static val SURROGATE: Byte

General category "Cs" in the Unicode specification.

Value: 19

TITLECASE_LETTER

static val TITLECASE_LETTER: Byte

General category "Lt" in the Unicode specification.

Value: 3

UNASSIGNED

static val UNASSIGNED: Byte

General category "Cn" in the Unicode specification.

Value: 0

UPPERCASE_LETTER

static val UPPERCASE_LETTER: Byte

General category "Lu" in the Unicode specification.

Value: 1

Character

Character(value: Char)

Deprecated: It is rarely appropriate to use this constructor. The static factory valueOf(char) is generally a better choice, as it is likely to yield significantly better space and time performance.

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

charCount

static fun charCount(codePoint: Int): Int

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

fun charValue(): Char

Returns the value of this Character object.

codePointAt

static fun codePointAt(
    a: CharArray!, 
    index: Int
): Int

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

static fun codePointAt(
    a: CharArray!, 
    index: Int, 
    limit: Int
): 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. 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

static fun codePointAt(
    seq: CharSequence, 
    index: Int
): Int

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

static fun codePointBefore(
    a: CharArray!, 
    index: Int
): Int

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

static fun codePointBefore(
    a: CharArray!, 
    index: Int, 
    start: Int
): 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. 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.

codePointBefore

static fun codePointBefore(
    seq: CharSequence, 
    index: Int
): Int

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.

codePointCount

static fun codePointCount(
    a: CharArray!, 
    offset: Int, 
    count: Int
): Int

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.

codePointCount

static fun codePointCount(
    seq: CharSequence, 
    beginIndex: Int, 
    endIndex: Int
): Int

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.

codePointOf

static fun codePointOf(name: String): Int

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

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

The name matching is case insensitive, with any leading and trailing whitespace character removed.

compare

static fun compare(
    x: Char, 
    y: Char
): Int

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

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

compareTo

fun compareTo(other: Char): Int

Compares two Character objects numerically.

digit

static fun digit(
    ch: Char, 
    radix: Int
): Int

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 ('\u005CuFF21') through Z ('\u005CuFF3A') and its code is less than radix + '\u005CuFF21' - 10. In this case, ch - '\u005CuFF21' + 10 is returned.
• The character is one of the fullwidth lowercase Latin letters a ('\u005CuFF41') through z ('\u005CuFF5A') and its code is less than radix + '\u005CuFF41' - 10. In this case, ch - '\u005CuFF41' + 10 is returned.

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

digit

static fun digit(
    codePoint: Int, 
    radix: Int
): Int

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 ('\u005CuFF21') through Z ('\u005CuFF3A') and its code is less than radix + '\u005CuFF21' - 10. In this case, codePoint - '\u005CuFF21' + 10 is returned.
• The character is one of the fullwidth lowercase Latin letters a ('\u005CuFF41') through z ('\u005CuFF5A') and its code is less than radix + '\u005CuFF41'- 10. In this case, codePoint - '\u005CuFF41' + 10 is returned.

equals

fun equals(other: Any?): Boolean

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

static fun forDigit(
    digit: Int, 
    radix: Int
): Char

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 ('\u005Cu0000') 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

static fun getDirectionality(ch: Char): Byte

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

static fun getDirectionality(codePoint: Int): Byte

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

static fun getName(codePoint: Int): String?

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:

getNumericValue

static fun getNumericValue(ch: Char): Int

Returns the int value that the specified Unicode character represents. For example, the character '\u005Cu216C' (the roman numeral fifty) will return an int with a value of 50.

The letters A-Z in their uppercase ('\u005Cu0041' through '\u005Cu005A'), lowercase ('\u005Cu0061' through '\u005Cu007A'), and full width variant ('\u005CuFF21' through '\u005CuFF3A' and '\u005CuFF41' through '\u005CuFF5A') 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.

getNumericValue

static fun getNumericValue(codePoint: Int): Int

Returns the int value that the specified character (Unicode code point) represents. For example, the character '\u005Cu216C' (the Roman numeral fifty) will return an int with a value of 50.

The letters A-Z in their uppercase ('\u005Cu0041' through '\u005Cu005A'), lowercase ('\u005Cu0061' through '\u005Cu007A'), and full width variant ('\u005CuFF21' through '\u005CuFF3A' and '\u005CuFF41' through '\u005CuFF5A') 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.

getType

static fun getType(ch: Char): Int

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

static fun getType(codePoint: Int): Int

Returns a value indicating a character's general category.

hashCode

fun hashCode(): Int

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

hashCode

static fun hashCode(value: Char): Int

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

highSurrogate

static fun highSurrogate(codePoint: Int): Char

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

static fun isAlphabetic(codePoint: Int): Boolean

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

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

static fun isBmpCodePoint(codePoint: Int): Boolean

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

static fun isDefined(ch: Char): Boolean

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.

isDefined

static fun isDefined(codePoint: Int): Boolean

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.

isDigit

static fun isDigit(ch: Char): Boolean

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:

• '\u005Cu0030' through '\u005Cu0039', ISO-LATIN-1 digits ('0' through '9')
• '\u005Cu0660' through '\u005Cu0669', Arabic-Indic digits
• '\u005Cu06F0' through '\u005Cu06F9', Extended Arabic-Indic digits
• '\u005Cu0966' through '\u005Cu096F', Devanagari digits
• '\u005CuFF10' through '\u005CuFF19', Fullwidth digits

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

isDigit

static fun isDigit(codePoint: Int): Boolean

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:

• '\u005Cu0030' through '\u005Cu0039', ISO-LATIN-1 digits ('0' through '9')
• '\u005Cu0660' through '\u005Cu0669', Arabic-Indic digits
• '\u005Cu06F0' through '\u005Cu06F9', Extended Arabic-Indic digits
• '\u005Cu0966' through '\u005Cu096F', Devanagari digits
• '\u005CuFF10' through '\u005CuFF19', Fullwidth digits

isHighSurrogate

static fun isHighSurrogate(ch: Char): Boolean

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

static fun isISOControl(ch: Char): Boolean

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 '\u005Cu0000' through '\u005Cu001F' or in the range '\u005Cu007F' through '\u005Cu009F'.

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

isISOControl

static fun isISOControl(codePoint: Int): Boolean

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 '\u005Cu0000' through '\u005Cu001F' or in the range '\u005Cu007F' through '\u005Cu009F'.

isIdentifierIgnorable

static fun isIdentifierIgnorable(ch: Char): Boolean

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
  • '\u005Cu0000' through '\u005Cu0008'
  • '\u005Cu000E' through '\u005Cu001B'
  • '\u005Cu007F' through '\u005Cu009F'
• 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

static fun isIdentifierIgnorable(codePoint: Int): Boolean

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
  • '\u005Cu0000' through '\u005Cu0008'
  • '\u005Cu000E' through '\u005Cu001B'
  • '\u005Cu007F' through '\u005Cu009F'
• all characters that have the FORMAT general category value

isIdeographic

static fun isIdeographic(codePoint: Int): Boolean

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

isJavaIdentifierPart

static fun isJavaIdentifierPart(ch: Char): Boolean

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 conditions 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

static fun isJavaIdentifierPart(codePoint: Int): Boolean

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 conditions 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 code point

isJavaIdentifierStart

static fun isJavaIdentifierStart(ch: Char): Boolean

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.

isJavaIdentifierStart

static fun isJavaIdentifierStart(codePoint: Int): Boolean

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 '_').

isJavaLetter

static fun isJavaLetter(ch: Char): Boolean

Deprecated: 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 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 '_').

isJavaLetterOrDigit

static fun isJavaLetterOrDigit(ch: Char): Boolean

Deprecated: 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 one of the following conditions is 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

static fun isLetter(ch: Char): Boolean

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

static fun isLetter(codePoint: Int): Boolean

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

static fun isLetterOrDigit(ch: Char): Boolean

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

static fun isLetterOrDigit(codePoint: Int): Boolean

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

static fun isLowSurrogate(ch: Char): Boolean

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

static fun isLowerCase(ch: Char): Boolean

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

static fun isLowerCase(codePoint: Int): Boolean

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

A character is lowercase if its general category type, provided by java.lang.Character#getType, 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.