Class java.lang.Character





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Class java.lang.Character


java.lang.Object
|
+----java.lang.Character



public final class Character
extends Object
implements Serializable

The Character class wraps a value of the primitive type char
in an object. An object of type Character contains a
single field whose type is char.

In addition, this class provides several methods for determining
the type of a character and converting characters from uppercase
to lowercase and vice versa.

Many of the methods of class Character are defined
in terms of a "Unicode attribute table" that specifies
a name for every defined Unicode code point. The table also
includes other attributes, such as a decimal value, an uppercase
equivalent, a lowercase equivalent, and/or a titlecase equivalent.
The Unicode attribute table is available on the World Wide Web as
the file:

ftp://unicode.org/pub/MappingTables/UnicodeData1.1.5.txt


For a more detailed specification of the Character
class, one that encompasses the exact behavior of methods such as
isDigit, isLetter,
isLowerCase, and isUpperCase over the
full range of Unicode values, see Gosling, Joy, and Steele, The
Java Language Specification.








COMBINING_SPACING_MARK


CONNECTOR_PUNCTUATION


CONTROL


CURRENCY_SYMBOL


DASH_PUNCTUATION


DECIMAL_DIGIT_NUMBER


ENCLOSING_MARK


END_PUNCTUATION


FORMAT


LETTER_NUMBER


LINE_SEPARATOR


LOWERCASE_LETTER


MATH_SYMBOL


MAX_RADIX
The maximum radix available for conversion to and from Strings.

MAX_VALUE
The constant value of this field is the largest value of type
char.

MIN_RADIX
The minimum radix available for conversion to and from Strings.

MIN_VALUE
The constant value of this field is the smallest value of type
char.

MODIFIER_LETTER


MODIFIER_SYMBOL


NON_SPACING_MARK


OTHER_LETTER


OTHER_NUMBER


OTHER_PUNCTUATION


OTHER_SYMBOL


PARAGRAPH_SEPARATOR


PRIVATE_USE


SPACE_SEPARATOR


START_PUNCTUATION


SURROGATE


TITLECASE_LETTER


TYPE
The Class object representing the primitive type char.

UNASSIGNED


UPPERCASE_LETTER







Character(char)
Constructs a Character object and initializes it so
that it represents the primitive value argument.






charValue()
Returns the value of this Character object.

digit(char, int)
Returns the numeric value of the character ch in the
specified radix.

equals(Object)
Compares this object against the specified object.

forDigit(int, int)
Determines the character representation for a specific digit in
the specified radix.

getNumericValue(char)
Returns the Unicode numeric value of the character as a
nonnegative integer.

getType(char)
Returns a value indicating a character category.

hashCode()
Returns a hash code for this Character.

isDefined(char)
Determines if a character has a defined meaning in Unicode.

isDigit(char)
Determines if the specified character is a digit.

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

isISOControl(char)
Determines if the specified character is an ISO control character.

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

isJavaIdentifierStart(char)
Determines if the specified character is
permissible as the first character in a Java identifier.

isJavaLetter(char)
Determines if the specified character is a
"Java" letter, that is, the character is permissible
as the first character in an identifier in the Java language.
Deprecated.

isJavaLetterOrDigit(char)
Determines if the specified character is a
"Java" letter or digit, that is, the character is
permissible as a non-initial character in an identifier in the
Java language.
Deprecated.

isLetter(char)
Determines if the specified character is a letter.

isLetterOrDigit(char)
Determines if the specified character is a letter or digit.

isLowerCase(char)
Determines if the specified character is a lowercase character.

isSpace(char)
Determines if the specified character is ISO-LATIN-1 white space.
Deprecated.

isSpaceChar(char)
Determines if the specified character is a Unicode space character.

isTitleCase(char)
Determines if the specified character is a titlecase character.

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

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

isUpperCase(char)
Determines if the specified character is an uppercase character.

isWhitespace(char)
Determines if the specified character is white space according to Java.

toLowerCase(char)
The given character is mapped to its lowercase equivalent; if the
character has no lowercase equivalent, the character itself is
returned.

toString()
Returns a String object representing this character's value.

toTitleCase(char)
Converts the character argument to titlecase.

toUpperCase(char)
Converts the character argument to uppercase.






MIN_RADIX

public static final 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.

See Also:
digit, forDigit, toString, valueOf



MAX_RADIX

public static final 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.

See Also:
digit, forDigit, toString, valueOf



MIN_VALUE

public static final char MIN_VALUE


The constant value of this field is the smallest value of type
char.


MAX_VALUE

public static final char MAX_VALUE


The constant value of this field is the largest value of type
char.


TYPE

public static final Class TYPE


The Class object representing the primitive type char.


UNASSIGNED

public static final byte UNASSIGNED


UPPERCASE_LETTER

public static final byte UPPERCASE_LETTER


LOWERCASE_LETTER

public static final byte LOWERCASE_LETTER


TITLECASE_LETTER

public static final byte TITLECASE_LETTER


MODIFIER_LETTER

public static final byte MODIFIER_LETTER


OTHER_LETTER

public static final byte OTHER_LETTER


NON_SPACING_MARK

public static final byte NON_SPACING_MARK


ENCLOSING_MARK

public static final byte ENCLOSING_MARK


COMBINING_SPACING_MARK

public static final byte COMBINING_SPACING_MARK


DECIMAL_DIGIT_NUMBER

public static final byte DECIMAL_DIGIT_NUMBER


LETTER_NUMBER

public static final byte LETTER_NUMBER


OTHER_NUMBER

public static final byte OTHER_NUMBER


SPACE_SEPARATOR

public static final byte SPACE_SEPARATOR


LINE_SEPARATOR

public static final byte LINE_SEPARATOR


PARAGRAPH_SEPARATOR

public static final byte PARAGRAPH_SEPARATOR


CONTROL

public static final byte CONTROL


FORMAT

public static final byte FORMAT


PRIVATE_USE

public static final byte PRIVATE_USE


SURROGATE

public static final byte SURROGATE


DASH_PUNCTUATION

public static final byte DASH_PUNCTUATION


START_PUNCTUATION

public static final byte START_PUNCTUATION


END_PUNCTUATION

public static final byte END_PUNCTUATION


CONNECTOR_PUNCTUATION

public static final byte CONNECTOR_PUNCTUATION


OTHER_PUNCTUATION

public static final byte OTHER_PUNCTUATION


MATH_SYMBOL

public static final byte MATH_SYMBOL


CURRENCY_SYMBOL

public static final byte CURRENCY_SYMBOL


MODIFIER_SYMBOL

public static final byte MODIFIER_SYMBOL


OTHER_SYMBOL

public static final byte OTHER_SYMBOL







Character

public Character(char value)


Constructs a Character object and initializes it so
that it represents the primitive value argument.


Parameters:
value - value for the new Character object.







charValue

public char charValue()


Returns the value of this Character object.


Returns:
the primitive char value represented by
this object.



hashCode

public int hashCode()


Returns a hash code for this Character.


Returns:
a hash code value for this object.
Overrides:
hashCode in class Object



equals

public 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.


Parameters:
obj - the object to compare with.
Returns:
true if the objects are the same;
false otherwise.
Overrides:
equals in class Object



toString

public String toString()


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


Returns:
a string representation of this object.
Overrides:
toString in class Object



isLowerCase

public static boolean isLowerCase(char ch)


Determines if the specified character is a lowercase character.
A character is lowercase if it is not in the range
'\u2000' through '\u2FFF', the Unicode
attribute table does not specify a mapping to lowercase for the
character, and at least one of the following is true:

The attribute table specifies a mapping to uppercase for the
character.
The name for the character contains the words "SMALL
LETTER".
The name for the character contains the words "SMALL
LIGATURE".

A character is considered to be lowercase if and only if
it is specified to be lowercase by the Unicode 2.0 standard
(category "Ll" in the Unicode specification data file).

Of the ISO-LATIN-1 characters (character codes 0x0000 through 0x00FF),
the following are lowercase:

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.


Parameters:
ch - the character to be tested.
Returns:
true if the character is lowercase;
false otherwise.
See Also:
isLowerCase, isTitleCase, toLowerCase



isUpperCase

public static boolean isUpperCase(char ch)


Determines if the specified character is an uppercase character.
A character is uppercase if it is not in the range
'\u2000' through '\u2FFF', the Unicode
attribute table does not specify a mapping to uppercase for the
character, and at least one of the following is true:

The attribute table specifies a mapping to lowercase for the
character.
The name for the character contains the words
"CAPITAL LETTER".
The name for the character contains the words
"CAPITAL LIGATURE".


Of the ISO-LATIN-1 characters (character codes 0x0000 through 0x00FF),
the following are uppercase:

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.


Parameters:
ch - the character to be tested.
Returns:
true if the character is uppercase;
false otherwise.
See Also:
isLowerCase, isTitleCase, toUpperCase



isTitleCase

public static boolean isTitleCase(char ch)


Determines if the specified character is a titlecase character.
A character is considered to be titlecase if and only if
it is specified to be titlecase by the Unicode 2.0 standard
(category "Lt" in the Unicode specification data file).

The printed representations of four Unicode 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 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



Parameters:
ch - the character to be tested.
Returns:
true if the character is titlecase;
false otherwise.
See Also:
isLowerCase, isUpperCase, toTitleCase



isDigit

public static boolean isDigit(char ch)


Determines if the specified character is a digit.
A character is considered to be a digit if it is not in the range
'\u2000' <= ch <= '\u2FFF'
and its Unicode name contains the word
"DIGIT". For a more complete
specification that encompasses all Unicode characters that are
defined as digits, see Gosling, Joy, and Steele, The Java
Language Specification.

These are the ranges of Unicode characters that are considered digits:

0x0030 through 0x0039
ISO-LATIN-1 digits ('0' through '9')
0x0660 through 0x0669 Arabic-Indic digits
0x06F0 through 0x06F9
Extended Arabic-Indic digits
0x0966 through 0x096F Devanagari digits
0x09E6 through 0x09EF Bengali digits
0x0A66 through 0x0A6F Gurmukhi digits
0x0AE6 through 0x0AEF Gujarati digits
0x0B66 through 0x0B6F Oriya digits
0x0BE7 through 0x0BEF Tamil digits
0x0C66 through 0x0C6F Telugu digits
0x0CE6 through 0x0CEF Kannada digits
0x0D66 through 0x0D6F Malayalam digits
0x0E50 through 0x0E59 Thai digits
0x0ED0 through 0x0ED9 Lao digits
0x0F20 through 0x0F29 Tibetan digits
0xFF10 through 0xFF19 Fullwidth digits



Parameters:
ch - the character to be tested.
Returns:
true if the character is a digit;
false otherwise.
See Also:
digit, forDigit



isDefined

public static boolean isDefined(char ch)


Determines if a character has a defined meaning in Unicode.
A character is defined if at least one of the following is true:

It has an entry in the Unicode attribute table.
Its value is in the range

'\u3040' <= ch <= '\u9FA5'.
Its value is in the range

'\uF900' <= ch <= '\uFA2D'.



Parameters:
ch - the character to be tested
Returns:
true if the character has a defined meaning
in Unicode; false otherwise.
See Also:
isDigit, isLetter, isLetterOrDigit, isLowerCase, isTitleCase, isUpperCase



isLetter

public static boolean isLetter(char ch)


Determines if the specified character is a letter. For a
more complete specification that encompasses all Unicode
characters, see Gosling, Joy, and Steele, The Java Language
Specification.
A character is considered to be a letter if and only if
it is specified to be a letter by the Unicode 2.0 standard
(category "Lu", "Ll", "Lt", "Lm", or "Lo" in the Unicode
specification data file).
Note that most ideographic characters are considered
to be letters (category "Lo") for this purpose.
Note also that not all letters have case: many Unicode characters are
letters but are neither uppercase nor lowercase nor titlecase.


Parameters:
ch - the character to be tested.
Returns:
true if the character is a letter;
false otherwise.
See Also:
isDigit, isJavaIdentifierStart, isJavaLetter, isJavaLetterOrDigit, isLetterOrDigit, isLowerCase, isTitleCase, isUnicodeIdentifierStart, isUpperCase



isLetterOrDigit

public static boolean isLetterOrDigit(char ch)


Determines if the specified character is a letter or digit.
For a more complete specification that encompasses all Unicode
characters, see Gosling, Joy, and Steele, The Java Language
Specification.
A character is considered to be a letter if and only if
it is specified to be a letter or a digit by the Unicode 2.0 standard
(category "Lu", "Ll", "Lt", "Lm", "Lo", or "Nd" in the Unicode
specification data file). In other words, isLetterOrDigit is true
of a character if and only if either isLetter is true of the character
or isDigit is true of the character.


Parameters:
ch - the character to be tested.
Returns:
true if the character is a letter or digit;
false otherwise.
See Also:
isDigit, isJavaIdentifierPart, isJavaLetter, isJavaLetterOrDigit, isLetter, isUnicodeIdentifierPart



isJavaLetter

public static boolean isJavaLetter(char ch)


Note: isJavaLetter() is deprecated.
Replaced by isJavaIdentifierStart(char).

Determines if the specified character is a
"Java" letter, that is, the character is permissible
as the first character in an identifier in the Java language.

A character is considered to be a Java letter if and only if it
is a letter, the ASCII dollar sign character '$', or
the underscore character '_'.


Parameters:
ch - the character to be tested.
Returns:
true if the character is a Java letter;
false otherwise.
See Also:
isJavaIdentifierStart, isJavaLetterOrDigit, isLetter, isLetterOrDigit, isUnicodeIdentifierStart



isJavaLetterOrDigit

public static boolean isJavaLetterOrDigit(char ch)


Note: isJavaLetterOrDigit() is deprecated.
Replaced by isJavaIdentifierPart(char).

Determines if the specified character is a
"Java" letter or digit, that is, the character is
permissible as a non-initial character in an identifier in the
Java language.

A character is considered to be a Java letter or digit if and
only if it is a letter, a digit, the ASCII dollar sign character
'$', or the underscore character '_'.


Parameters:
ch - the character to be tested.
Returns:
true if the character is a Java letter or digit;
false otherwise.
See Also:
isJavaIdentifierPart, isJavaLetter, isLetter, isLetterOrDigit, isUnicodeIdentifierPart



isJavaIdentifierStart

public static 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
it is one of the following:

a letter
a currency symbol (such as "$")
a connecting punctuation character (such as "_").



Parameters:
ch - the character to be tested.
Returns:
true if the character may start a Java identifier;
false otherwise.
See Also:
isJavaIdentifierPart, isLetter, isUnicodeIdentifierStart



isJavaIdentifierPart

public static 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 and only if
it is one of the following:

a letter
a currency symbol (such as "$")
a connecting punctuation character (such as "_").
a digit
a numeric letter (such as a Roman numeral character)
a combining mark
a non-spacing mark
an ignorable control character



Parameters:
ch - the character to be tested.
Returns:
true if the character may be part of a Unicode identifier;
false otherwise.
See Also:
isIdentifierIgnorable, isJavaIdentifierStart, isLetterOrDigit, isUnicodeIdentifierPart



isUnicodeIdentifierStart

public static 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
it is a letter.


Parameters:
ch - the character to be tested.
Returns:
true if the character may start a Unicode identifier;
false otherwise.
See Also:
isJavaIdentifierStart, isLetter, isUnicodeIdentifierPart



isUnicodeIdentifierPart

public static 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
it is one of the following:

a letter
a connecting punctuation character (such as "_").
a digit
a numeric letter (such as a Roman numeral character)
a combining mark
a non-spacing mark
an ignorable control character



Parameters:
ch - the character to be tested.
Returns:
true if the character may be part of a Unicode identifier;
false otherwise.
See Also:
isIdentifierIgnorable, isJavaIdentifierPart, isLetterOrDigit, isUnicodeIdentifierStart



isIdentifierIgnorable

public static 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:

0x0000 through 0x0008,
ISO control characters that
0x000E through 0x001B, are not whitespace
and 0x007F through 0x009F
0x200C through 0x200F join controls
0x200A through 0x200E bidirectional controls
0x206A through 0x206F format controls
0xFEFF zero-width no-break space



Parameters:
ch - the character to be tested.
Returns:
true if the character may be part of a Unicode identifier;
false otherwise.
See Also:
isJavaIdentifierPart, isUnicodeIdentifierPart



toLowerCase

public static char toLowerCase(char ch)


The given character is mapped to its lowercase equivalent; if the
character has no lowercase equivalent, the character itself is
returned.

A character has a lowercase equivalent if and only if a lowercase
mapping is specified for the character in the Unicode attribute
table.

Note that some Unicode characters in the range
'\u2000' to '\u2FFF' have lowercase
mappings; this method does map such characters to their lowercase
equivalents even though the method isUpperCase does
not return true for such characters.


Parameters:
ch - the character to be converted.
Returns:
the lowercase equivalent of the character, if any;
otherwise the character itself.
See Also:
isLowerCase, isUpperCase, toTitleCase, toUpperCase



toUpperCase

public static char toUpperCase(char ch)


Converts the character argument to uppercase. A character has an
uppercase equivalent if and only if an uppercase mapping is
specified for the character in the Unicode attribute table.

Note that some Unicode characters in the range
'\u2000' to '\u2000FFF' have uppercase
mappings; this method does map such characters to their titlecase
equivalents even though the method isLowerCase does
not return true for such characters.


Parameters:
ch - the character to be converted.
Returns:
the uppercase equivalent of the character, if any;
otherwise the character itself.
See Also:
isLowerCase, isUpperCase, toLowerCase, toTitleCase



toTitleCase

public static char toTitleCase(char ch)


Converts the character argument to titlecase. A character has a
titlecase equivalent if and only if a titlecase mapping is
specified for the character in the Unicode attribute table.

Note that some Unicode characters in the range
'\u2000' through '\u2FFF' have titlecase
mappings; this method does map such characters to their titlecase
equivalents even though the method isTitleCase does
not return true for such characters.

There are only four Unicode characters that are truly titlecase forms
that are distinct from uppercase forms. As a rule, if a character has no
true titlecase equivalent but does have an uppercase mapping, then the
Unicode 2.0 attribute table specifies a titlecase mapping that is the
same as the uppercase mapping.


Parameters:
ch - the character to be converted.
Returns:
the titlecase equivalent of the character, if any;
otherwise the character itself.
See Also:
isTitleCase, toLowerCase, toUpperCase



digit

public static 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.



Parameters:
ch - the character to be converted.
radix - the radix.
Returns:
the numeric value represented by the character in the
specified radix.
See Also:
forDigit, isDigit



getNumericValue

public static int getNumericValue(char ch)


Returns the Unicode numeric value of the character as a
nonnegative integer.
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.


Parameters:
ch - the character to be converted.
radix - the radix.
Returns:
the numeric value of the character, as a nonnegative int value;
-2 if the character has a numeric value that is not a
nonnegative integer; -1 if the character has no numeric value.
See Also:
forDigit, isDigit



isSpace

public static boolean isSpace(char ch)


Note: isSpace() is deprecated.
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:

'\t' \u0009 HORIZONTAL TABULATION
'\n' \u000A NEW LINE
'\f' \u000C FORM FEED
'\r' \u000D CARRIAGE RETURN
'  '
\u0020 SPACE



Parameters:
ch - the character to be tested.
Returns:
true if the character is ISO-LATIN-1 white
space; false otherwise.
See Also:
isSpaceChar, isWhitespace



isSpaceChar

public static 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 2.0 standard
(category "Zs", "Zl, or "Zp" in the Unicode specification data file).


Parameters:
ch - the character to be tested.
Returns:
true if the character is a space character; false otherwise.
See Also:
isWhitespace



isWhitespace

public static boolean isWhitespace(char ch)


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

It is a Unicode space separator (category "Zs"), but is not
a no-break space (\u00A0 or \uFEFF).
It is a Unicode line separator (category "Zl").
It is a Unicode paragraph separator (category "Zp").
It is \u0009, HORIZONTAL TABULATION.
It is \u000A, LINE FEED.
It is \u000B, VERTICAL TABULATION.
It is \u000C, FORM FEED.
It is \u000D, CARRIAGE RETURN.
It is \u001C, FILE SEPARATOR.
It is \u001D, GROUP SEPARATOR.
It is \u001E, RECORD SEPARATOR.
It is \u001F, UNIT SEPARATOR.



Parameters:
ch - the character to be tested.
Returns:
true if the character is a Java whitespace character;
false otherwise.
See Also:
isSpaceChar



isISOControl

public static 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.


Parameters:
ch - the character to be tested.
Returns:
true if the character is an ISO control character;
false otherwise.
See Also:
isSpaceChar, isWhitespace



getType

public static int getType(char ch)


Returns a value indicating a character category.


Parameters:
ch - the character to be tested.
Returns:
a value of type int, the character category.
See Also:
COMBINING_SPACING_MARK, CONNECTOR_PUNCTUATION, CONTROL, CURRENCY_SYMBOL, DASH_PUNCTUATION, DECIMAL_DIGIT_NUMBER, ENCLOSING_MARK, END_PUNCTUATION, FORMAT, LETTER_NUMBER, LINE_SEPARATOR, LOWERCASE_LETTER, MATH_SYMBOL, MODIFIER_LETTER, MODIFIER_SYMBOL, NON_SPACING_MARK, OTHER_LETTER, OTHER_NUMBER, OTHER_PUNCTUATION, OTHER_SYMBOL, PARAGRAPH_SEPARATOR, PRIVATE_USE, SPACE_SEPARATOR, START_PUNCTUATION, SURROGATE, TITLECASE_LETTER, UNASSIGNED, UPPERCASE_LETTER



forDigit

public static 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.


Parameters:
digit - the number to convert to a character.
radix - the radix.
Returns:
the char representation of the specified digit
in the specified radix.
See Also:
MIN_RADIX, MAX_RADIX, digit




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