oracle.adfnmc.java.lang
Class CharacterHelper

java.lang.Object
  oracle.adfnmc.java.lang.CharacterHelper

public class CharacterHelper
extends java.lang.Object

Field Summary

static byte	COMBINING_SPACING_MARK Unicode category constant Mc.
static byte	CONNECTOR_PUNCTUATION Unicode category constant Pc.
static byte	CONTROL Unicode category constant Cc.
static byte	CURRENCY_SYMBOL Unicode category constant Sc.
static byte	DASH_PUNCTUATION Unicode category constant Pd.
static byte	DECIMAL_DIGIT_NUMBER Unicode category constant Nd.
static byte	DIRECTIONALITY_ARABIC_NUMBER Unicode bidirectional constant AN.
static byte	DIRECTIONALITY_BOUNDARY_NEUTRAL Unicode bidirectional constant BN.
static byte	DIRECTIONALITY_COMMON_NUMBER_SEPARATOR Unicode bidirectional constant CS.
static byte	DIRECTIONALITY_EUROPEAN_NUMBER Unicode bidirectional constant EN.
static byte	DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR Unicode bidirectional constant ES.
static byte	DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR Unicode bidirectional constant ET.
static byte	DIRECTIONALITY_LEFT_TO_RIGHT Unicode bidirectional constant L.
static byte	DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING Unicode bidirectional constant LRE.
static byte	DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE Unicode bidirectional constant LRO.
static byte	DIRECTIONALITY_NONSPACING_MARK Unicode bidirectional constant NSM.
static byte	DIRECTIONALITY_OTHER_NEUTRALS Unicode bidirectional constant ON.
static byte	DIRECTIONALITY_PARAGRAPH_SEPARATOR Unicode bidirectional constant B.
static byte	DIRECTIONALITY_POP_DIRECTIONAL_FORMAT Unicode bidirectional constant PDF.
static byte	DIRECTIONALITY_RIGHT_TO_LEFT Unicode bidirectional constant R.
static byte	DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC Unicode bidirectional constant AL.
static byte	DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING Unicode bidirectional constant RLE.
static byte	DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE Unicode bidirectional constant RLO.
static byte	DIRECTIONALITY_SEGMENT_SEPARATOR Unicode bidirectional constant S.
static byte	DIRECTIONALITY_UNDEFINED Unicode bidirectional constant.
static byte	DIRECTIONALITY_WHITESPACE Unicode bidirectional constant WS.
static byte	ENCLOSING_MARK Unicode category constant Me.
static byte	END_PUNCTUATION Unicode category constant Pe.
static byte	FINAL_QUOTE_PUNCTUATION Unicode category constant Pf.
static byte	FORMAT Unicode category constant Cf.
static byte	INITIAL_QUOTE_PUNCTUATION Unicode category constant Pi.
static byte	LETTER_NUMBER Unicode category constant Nl.
static byte	LINE_SEPARATOR Unicode category constant Zl.
static byte	LOWERCASE_LETTER Unicode category constant Ll.
static byte	MATH_SYMBOL Unicode category constant Sm.
static int	MAX_CODE_POINT Maximum code point value - U+10FFFF.
static char	MAX_HIGH_SURROGATE Maximum value of a high surrogate or leading surrogate unit in UTF-16 encoding - '\uDBFF'.
static char	MAX_LOW_SURROGATE Maximum value of a low surrogate or trailing surrogate unit in UTF-16 encoding - '\uDFFF'.
static int	MAX_RADIX The maximum possible radix used for conversions between Characters and integers.
static char	MAX_SURROGATE Maximum value of a surrogate unit in UTF-16 encoding - '\uDFFF'.
static char	MAX_VALUE The maximum possible Character value.
static int	MIN_CODE_POINT Minimum code point value - U+0000.
static char	MIN_HIGH_SURROGATE Minimum value of a high surrogate or leading surrogate unit in UTF-16 encoding - '\uD800'.
static char	MIN_LOW_SURROGATE Minimum value of a low surrogate or trailing surrogate unit in UTF-16 encoding - '\uDC00'.
static int	MIN_RADIX The minimum possible radix used for conversions between Characters and integers.
static int	MIN_SUPPLEMENTARY_CODE_POINT Minimum value of a supplementary code point - U+010000.
static char	MIN_SURROGATE Minimum value of a surrogate unit in UTF-16 encoding - '\uD800'.
static char	MIN_VALUE The minimum possible Character value.
static byte	MODIFIER_LETTER Unicode category constant Lm.
static byte	MODIFIER_SYMBOL Unicode category constant Sk.
static byte	NON_SPACING_MARK Unicode category constant Mn.
static byte	OTHER_LETTER Unicode category constant Lo.
static byte	OTHER_NUMBER Unicode category constant No.
static byte	OTHER_PUNCTUATION Unicode category constant Po.
static byte	OTHER_SYMBOL Unicode category constant So.
static byte	PARAGRAPH_SEPARATOR Unicode category constant Zp.
static byte	PRIVATE_USE Unicode category constant Co.
static int	SIZE Constant for the number of bits to represent a char in two's compliment form.
static byte	SPACE_SEPARATOR Unicode category constant Zs.
static byte	START_PUNCTUATION Unicode category constant Ps.
static byte	SURROGATE Unicode category constant Cs.
static byte	TITLECASE_LETTER Unicode category constant Lt.
static byte	UNASSIGNED Unicode category constant Cn.
static byte	UPPERCASE_LETTER Unicode category constant Lu.

Constructor Summary

CharacterHelper()

Method Summary

static int	charCount(int codePoint) Calculates the number of char values required to represent the Unicode code point.
static int	codePointAt(char[] seq, int index) Returns the code point at the index in the char[].
static char	forDigit(int digit, int radix) Answers the character which represents the value in the specified radix.
static int	getType(char c) Gets the general Unicode category of the specified character.
static boolean	isDefined(char c) Answers whether the specified character is defined in the Unicode specification.
static boolean	isDigit(char c) Answers whether the character is a digit.
static boolean	isHighSurrogate(char ch) A test for determining if the char is a high surrogate/leading surrogate unit that's used for representing supplementary characters in UTF-16 encoding.
static boolean	isIdentifierIgnorable(char c) Answers whether the specified character is ignorable in a Java or Unicode identifier.
static boolean	isISOControl(char c) Answers whether the character is an ISO control character.
static boolean	isISOControl(int c) Answers whether the character is an ISO control character.
static boolean	isJavaIdentifierPart(char c) Answers whether the character is a valid part of a Unicode identifier as other than the first character.
static boolean	isJavaIdentifierStart(char c) Answers whether the character is a valid start of a Unicode identifier
static boolean	isLetter(char c) Answers whether the character is a letter.
static boolean	isLetterOrDigit(char c) Answers whether the character is a letter or a digit.
static boolean	isLowerCase(char c) Answers whether the character is a lower case letter.
static boolean	isLowSurrogate(char ch) A test for determining if the char is a high surrogate/leading surrogate unit that's used for representing supplementary characters in UTF-16 encoding.
static boolean	isMirrored(char c) Answers whether the specified character is mirrored
static boolean	isSpace(char c) Deprecated. Use isWhitespace
static boolean	isSpaceChar(char c) Answers whether the character is a Unicode space character.
static boolean	isSupplementaryCodePoint(int codePoint) A test for determining if the codePoint is within the supplementary code point range.
static boolean	isSurrogatePair(char high, char low) A test for determining if the char pair is a valid surrogate pair.
static boolean	isTitleCase(char c) Answers whether the character is a titlecase character.
static boolean	isUnicodeIdentifierPart(char c) Answers whether the character is valid as part of a Unicode identifier as other than the first character.
static boolean	isUnicodeIdentifierStart(char c) Answers whether the character is a valid initial character for a Unicode identifier.
static boolean	isUpperCase(char c) Answers whether the character is an upper case letter.
static boolean	isValidCodePoint(int codePoint) A test for determining if the codePoint is a valid Unicode code point.
static boolean	isWhitespace(char c) Answers whether the character is a whitespace character in Java.
static char[]	toChars(int codePoint) Converts the Unicode code point, codePoint, into a UTF-16 encoded sequence that is returned as a char[].
static int	toCodePoint(char high, char low) Converts a surrogate pair into a Unicode code point.
static java.lang.String	toString(char value) Converts the specified character to its string representation.
static char	toUpperCase(char c) Answers the upper case equivalent for the character when the character is a lower case letter, otherwise answers the character.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MIN_VALUE

public static final char MIN_VALUE

The minimum possible Character value.

See Also:

Constant Field Values

MAX_VALUE

public static final char MAX_VALUE

The maximum possible Character value.

See Also:

Constant Field Values

MIN_RADIX

public static final int MIN_RADIX

The minimum possible radix used for conversions between Characters and integers.

See Also:

Constant Field Values

MAX_RADIX

public static final int MAX_RADIX

The maximum possible radix used for conversions between Characters and integers.

See Also:

Constant Field Values

UNASSIGNED

public static final byte UNASSIGNED

Unicode category constant Cn.

See Also:

Constant Field Values

UPPERCASE_LETTER

public static final byte UPPERCASE_LETTER

Unicode category constant Lu.

See Also:

Constant Field Values

LOWERCASE_LETTER

public static final byte LOWERCASE_LETTER

Unicode category constant Ll.

See Also:

Constant Field Values

TITLECASE_LETTER

public static final byte TITLECASE_LETTER

Unicode category constant Lt.

See Also:

Constant Field Values

MODIFIER_LETTER

public static final byte MODIFIER_LETTER

Unicode category constant Lm.

See Also:

Constant Field Values

OTHER_LETTER

public static final byte OTHER_LETTER

Unicode category constant Lo.

See Also:

Constant Field Values

NON_SPACING_MARK

public static final byte NON_SPACING_MARK

Unicode category constant Mn.

See Also:

Constant Field Values

ENCLOSING_MARK

public static final byte ENCLOSING_MARK

Unicode category constant Me.

See Also:

Constant Field Values

COMBINING_SPACING_MARK

public static final byte COMBINING_SPACING_MARK

Unicode category constant Mc.

See Also:

Constant Field Values

DECIMAL_DIGIT_NUMBER

public static final byte DECIMAL_DIGIT_NUMBER

Unicode category constant Nd.

See Also:

Constant Field Values

LETTER_NUMBER

public static final byte LETTER_NUMBER

Unicode category constant Nl.

See Also:

Constant Field Values

OTHER_NUMBER

public static final byte OTHER_NUMBER

Unicode category constant No.

See Also:

Constant Field Values

SPACE_SEPARATOR

public static final byte SPACE_SEPARATOR

Unicode category constant Zs.

See Also:

Constant Field Values

LINE_SEPARATOR

public static final byte LINE_SEPARATOR

Unicode category constant Zl.

See Also:

Constant Field Values

PARAGRAPH_SEPARATOR

public static final byte PARAGRAPH_SEPARATOR

Unicode category constant Zp.

See Also:

Constant Field Values

CONTROL

public static final byte CONTROL

Unicode category constant Cc.

See Also:

Constant Field Values

FORMAT

public static final byte FORMAT

Unicode category constant Cf.

See Also:

Constant Field Values

PRIVATE_USE

public static final byte PRIVATE_USE

Unicode category constant Co.

See Also:

Constant Field Values

SURROGATE

public static final byte SURROGATE

Unicode category constant Cs.

See Also:

Constant Field Values

DASH_PUNCTUATION

public static final byte DASH_PUNCTUATION

Unicode category constant Pd.

See Also:

Constant Field Values

START_PUNCTUATION

public static final byte START_PUNCTUATION

Unicode category constant Ps.

See Also:

Constant Field Values

END_PUNCTUATION

public static final byte END_PUNCTUATION

Unicode category constant Pe.

See Also:

Constant Field Values

CONNECTOR_PUNCTUATION

public static final byte CONNECTOR_PUNCTUATION

Unicode category constant Pc.

See Also:

Constant Field Values

OTHER_PUNCTUATION

public static final byte OTHER_PUNCTUATION

Unicode category constant Po.

See Also:

Constant Field Values

MATH_SYMBOL

public static final byte MATH_SYMBOL

Unicode category constant Sm.

See Also:

Constant Field Values

CURRENCY_SYMBOL

public static final byte CURRENCY_SYMBOL

Unicode category constant Sc.

See Also:

Constant Field Values

MODIFIER_SYMBOL

public static final byte MODIFIER_SYMBOL

Unicode category constant Sk.

See Also:

Constant Field Values

OTHER_SYMBOL

public static final byte OTHER_SYMBOL

Unicode category constant So.

See Also:

Constant Field Values

INITIAL_QUOTE_PUNCTUATION

public static final byte INITIAL_QUOTE_PUNCTUATION

Unicode category constant Pi.

Since:

1.4

See Also:

Constant Field Values

FINAL_QUOTE_PUNCTUATION

public static final byte FINAL_QUOTE_PUNCTUATION

Unicode category constant Pf.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_UNDEFINED

public static final byte DIRECTIONALITY_UNDEFINED

Unicode bidirectional constant.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_LEFT_TO_RIGHT

public static final byte DIRECTIONALITY_LEFT_TO_RIGHT

Unicode bidirectional constant L.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_RIGHT_TO_LEFT

public static final byte DIRECTIONALITY_RIGHT_TO_LEFT

Unicode bidirectional constant R.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC

public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC

Unicode bidirectional constant AL.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_EUROPEAN_NUMBER

public static final byte DIRECTIONALITY_EUROPEAN_NUMBER

Unicode bidirectional constant EN.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR

public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR

Unicode bidirectional constant ES.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR

public static final byte DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR

Unicode bidirectional constant ET.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_ARABIC_NUMBER

public static final byte DIRECTIONALITY_ARABIC_NUMBER

Unicode bidirectional constant AN.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_COMMON_NUMBER_SEPARATOR

public static final byte DIRECTIONALITY_COMMON_NUMBER_SEPARATOR

Unicode bidirectional constant CS.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_NONSPACING_MARK

public static final byte DIRECTIONALITY_NONSPACING_MARK

Unicode bidirectional constant NSM.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_BOUNDARY_NEUTRAL

public static final byte DIRECTIONALITY_BOUNDARY_NEUTRAL

Unicode bidirectional constant BN.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_PARAGRAPH_SEPARATOR

public static final byte DIRECTIONALITY_PARAGRAPH_SEPARATOR

Unicode bidirectional constant B.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_SEGMENT_SEPARATOR

public static final byte DIRECTIONALITY_SEGMENT_SEPARATOR

Unicode bidirectional constant S.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_WHITESPACE

public static final byte DIRECTIONALITY_WHITESPACE

Unicode bidirectional constant WS.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_OTHER_NEUTRALS

public static final byte DIRECTIONALITY_OTHER_NEUTRALS

Unicode bidirectional constant ON.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING

public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING

Unicode bidirectional constant LRE.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE

public static final byte DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE

Unicode bidirectional constant LRO.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING

public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING

Unicode bidirectional constant RLE.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE

public static final byte DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE

Unicode bidirectional constant RLO.

Since:

1.4

See Also:

Constant Field Values

DIRECTIONALITY_POP_DIRECTIONAL_FORMAT

public static final byte DIRECTIONALITY_POP_DIRECTIONAL_FORMAT

Unicode bidirectional constant PDF.

Since:

1.4

See Also:

Constant Field Values

MIN_HIGH_SURROGATE

public static final char MIN_HIGH_SURROGATE

Minimum value of a high surrogate or leading surrogate unit in UTF-16 encoding - '\uD800'.

Since:

1.5

See Also:

Constant Field Values

MAX_HIGH_SURROGATE

public static final char MAX_HIGH_SURROGATE

Maximum value of a high surrogate or leading surrogate unit in UTF-16 encoding - '\uDBFF'.

Since:

1.5

See Also:

Constant Field Values

MIN_LOW_SURROGATE

public static final char MIN_LOW_SURROGATE

Minimum value of a low surrogate or trailing surrogate unit in UTF-16 encoding - '\uDC00'.

Since:

1.5

See Also:

Constant Field Values

MAX_LOW_SURROGATE

public static final char MAX_LOW_SURROGATE

Maximum value of a low surrogate or trailing surrogate unit in UTF-16 encoding - '\uDFFF'.

Since:

1.5

See Also:

Constant Field Values

MIN_SURROGATE

public static final char MIN_SURROGATE

Minimum value of a surrogate unit in UTF-16 encoding - '\uD800'.

Since:

1.5

See Also:

Constant Field Values

MAX_SURROGATE

public static final char MAX_SURROGATE

Maximum value of a surrogate unit in UTF-16 encoding - '\uDFFF'.

Since:

1.5

See Also:

Constant Field Values

MIN_SUPPLEMENTARY_CODE_POINT

public static final int MIN_SUPPLEMENTARY_CODE_POINT

Minimum value of a supplementary code point - U+010000.

Since:

1.5

See Also:

Constant Field Values

MIN_CODE_POINT

public static final int MIN_CODE_POINT

Minimum code point value - U+0000.

Since:

1.5

See Also:

Constant Field Values

MAX_CODE_POINT

public static final int MAX_CODE_POINT

Maximum code point value - U+10FFFF.

Since:

1.5

See Also:

Constant Field Values

SIZE

public static final int SIZE

Constant for the number of bits to represent a char in two's compliment form.

Since:

1.5

See Also:

Constant Field Values

Constructor Detail

CharacterHelper

public CharacterHelper()

Method Detail

isWhitespace

public static boolean isWhitespace(char c)

Answers whether the character is a whitespace character in Java.

Parameters:

c - the character

Returns:

true if the supplied c is a whitespace character in Java, otherwise false.

isJavaIdentifierStart

public static boolean isJavaIdentifierStart(char c)

Answers whether the character is a valid start of a Unicode identifier

Parameters:

c - the character

Returns:

true when the character is a valid start of a Java identifier, false otherwise

getType

public static int getType(char c)

Gets the general Unicode category of the specified character.

Parameters:

c - the character

Returns:

the Unicode category

isJavaIdentifierPart

public static boolean isJavaIdentifierPart(char c)

Answers whether the character is a valid part of a Unicode identifier as other than the first character.

Parameters:

c - the character

Returns:

true when the character is valid as part of a Java identifier, false otherwise

isLetter

public static boolean isLetter(char c)

Answers whether the character is a letter.

Parameters:

c - the character

Returns:

true when the character is a letter, false otherwise

isDigit

public static boolean isDigit(char c)

Answers whether the character is a digit.

Parameters:

c - the character

Returns:

true when the character is a digit, false otherwise

isLetterOrDigit

public static boolean isLetterOrDigit(char c)

Answers whether the character is a letter or a digit.

Parameters:

c - the character

Returns:

true when the character is a letter or a digit, false otherwise

isLowerCase

public static boolean isLowerCase(char c)

Answers whether the character is a lower case letter.

Parameters:

c - the character

Returns:

true when the character is a lower case letter, false otherwise

isUpperCase

public static boolean isUpperCase(char c)

Answers whether the character is an upper case letter.

Parameters:

c - the character

Returns:

true when the character is a upper case letter, false otherwise

forDigit

public static char forDigit(int digit,
                            int radix)

Answers the character which represents the value in the specified radix. The radix must be between MIN_RADIX and MAX_RADIX inclusive.

Parameters:

digit - the integer value

radix - the radix

Returns:

the character which represents the value in the radix

isSupplementaryCodePoint

public static boolean isSupplementaryCodePoint(int codePoint)

A test for determining if the codePoint is within the supplementary code point range.

Parameters:

codePoint - The code point to test.

Returns:

A boolean value.

Since:

1.5

toChars

public static char[] toChars(int codePoint)

Converts the Unicode code point, codePoint, into a UTF-16 encoded sequence that is returned as a char[].

Parameters:

codePoint - The Unicode code point to encode.

Returns:

The UTF-16 encoded char sequence; if code point is a supplementary code point, then a 2 char array is returned, otherwise a 1 char array is returned.

Throws:

java.lang.IllegalArgumentException - if codePoint is not a valid Unicode code point.

Since:

1.5

isValidCodePoint

public static boolean isValidCodePoint(int codePoint)

A test for determining if the codePoint is a valid Unicode code point.

Parameters:

codePoint - The code point to test.

Returns:

A boolean value.

Since:

1.5

isUnicodeIdentifierStart

public static boolean isUnicodeIdentifierStart(char c)

Answers whether the character is a valid initial character for a Unicode identifier.

Parameters:

c - the character

Returns:

true when the character is a valid start of a Unicode identifier, false otherwise

isUnicodeIdentifierPart

public static boolean isUnicodeIdentifierPart(char c)

Answers whether the character is valid as part of a Unicode identifier as other than the first character.

Parameters:

c - the character

Returns:

true when the character is valid as part of a Unicode identifier, false otherwise

isIdentifierIgnorable

public static boolean isIdentifierIgnorable(char c)

Answers whether the specified character is ignorable in a Java or Unicode identifier.

Parameters:

c - the character

Returns:

true when the character is ignorable, false otherwise

isTitleCase

public static boolean isTitleCase(char c)

Answers whether the character is a titlecase character.

Parameters:

c - the character

Returns:

true when the character is a titlecase character, false otherwise

isSpaceChar

public static boolean isSpaceChar(char c)

Answers whether the character is a Unicode space character. A member of one of the Unicode categories Space Separator, Line Separator, or Paragraph Separator.

Parameters:

c - the character

Returns:

true when the character is a Unicode space character, false otherwise

isISOControl

public static boolean isISOControl(char c)

Answers whether the character is an ISO control character.

Parameters:

c - the character

Returns:

true if c is an ISO control character, otherwise false

isISOControl

public static boolean isISOControl(int c)

Answers whether the character is an ISO control character.

Parameters:

c - the character, including supplementary characters

Returns:

true if c is an ISO control character, otherwise false

isDefined

public static boolean isDefined(char c)

Answers whether the specified character is defined in the Unicode specification.

Parameters:

c - the character

Returns:

true if the general Unicode category of the character is not UNASSIGNED, false otherwise

isMirrored

public static boolean isMirrored(char c)

Answers whether the specified character is mirrored

Parameters:

c - the character

Returns:

true if the character is mirrored, false otherwise

toString

public static java.lang.String toString(char value)

Converts the specified character to its string representation.

Parameters:

value - the character

Returns:

the character converted to a string

isSurrogatePair

public static boolean isSurrogatePair(char high,
                                      char low)

A test for determining if the char pair is a valid surrogate pair.

Parameters:

high - The high surrogate unit to test.

low - The low surrogate unit to test.

Returns:

A boolean value.

Since:

1.5

See Also:

isHighSurrogate(char), isLowSurrogate(char)

isHighSurrogate

public static boolean isHighSurrogate(char ch)

A test for determining if the char is a high surrogate/leading surrogate unit that's used for representing supplementary characters in UTF-16 encoding.

Parameters:

ch - The char unit to test.

Returns:

A boolean value.

Since:

1.5

See Also:

isLowSurrogate(char)

isLowSurrogate

public static boolean isLowSurrogate(char ch)

A test for determining if the char is a high surrogate/leading surrogate unit that's used for representing supplementary characters in UTF-16 encoding.

Parameters:

ch - The char unit to test.

Returns:

A boolean value.

Since:

1.5

See Also:

isHighSurrogate(char)

toCodePoint

public static int toCodePoint(char high,
                              char low)

Converts a surrogate pair into a Unicode code point. This method assume that the pair are valid surrogates. If the pair are NOT valid surrogates, then the result is indeterminate. The isSurrogatePair(char, char) method should be used prior to this method to validate the pair.

Parameters:

high - The high surrogate unit.

low - The low surrogate unit.

Returns:

The decoded code point.

Since:

1.5

See Also:

isSurrogatePair(char, char)

codePointAt

public static int codePointAt(char[] seq,
                              int index)

Returns the code point at the index in the char[]. If char unit at the index is a high-surrogate unit, the next index is less than the length of the sequence and the char unit at the next index is a low surrogate unit, then the code point represented by the pair is returned; otherwise the char unit at the index is returned.

Parameters:

seq - The sequence of char units.

index - The index into the seq to retrieve and convert.

Returns:

The Unicode code point.

Throws:

java.lang.NullPointerException - if seq is null.

java.lang.IndexOutOfBoundsException - if the index is negative or greater than or equal to seq.length().

Since:

1.5

charCount

public static int charCount(int codePoint)

Calculates the number of char values required to represent the Unicode code point. This method only tests if the codePoint is greater than or equal to 0x10000, in which case 2 is returned, otherwise 1. To test if the code point is valid, use the isValidCodePoint(int) method.

Parameters:

codePoint - The code point to test.

Returns:

An int value of 2 or 1.

Since:

1.5

See Also:

isValidCodePoint(int), isSupplementaryCodePoint(int)

toUpperCase

public static char toUpperCase(char c)

Answers the upper case equivalent for the character when the character is a lower case letter, otherwise answers the character.

Parameters:

c - the character

Returns:

if c is not an upper case character then its upper case counterpart, otherwise just c

isSpace

public static boolean isSpace(char c)

Deprecated. Use isWhitespace

Answers whether the character is a Java space.