java.lang
Class Character

java.lang.Object
  java.lang.Character

All Implemented Interfaces:

Comparable<Character>

public final class Character
extends Object
implements Comparable<Character>

Field Summary

static int	MAX_CODE_POINT
static char	MAX_HIGH_SURROGATE
static char	MAX_LOW_SURROGATE
static int	MAX_RADIX
static char	MAX_SURROGATE
static char	MAX_VALUE
static int	MIN_CODE_POINT
static char	MIN_HIGH_SURROGATE
static char	MIN_LOW_SURROGATE
static int	MIN_RADIX
static int	MIN_SUPPLEMENTARY_CODE_POINT
static char	MIN_SURROGATE
static char	MIN_VALUE
static int	SIZE

Constructor Summary

Character(char c)

Method Summary

static int	charCount(int codepoint)
char	charValue()
int	codePointAt(char[] c, int index)
int	codePointAt(char[] c, int index, int limit)
int	codePointAt(CharSequence c, int index)
int	codePointBefore(char[] c, int index)
int	codePointBefore(char[] c, int index, int start)
int	codePointBefore(CharSequence c, int index)
int	compareTo(Character ob) Compares this with another Object.
static int	digit(char ch, int radix) This method accepts a character such as '7' or 'C' and converts it to a number value.
static int	digit(int ch, int radix)
boolean	equals(Object o)
static char	forDigit(int digit, int radix)
int	hashCode()
static boolean	isDigit(char ch) Identifies if a character is a numerical digit.
static boolean	isHighSurrogate(char high)
static boolean	isLowSurrogate(char low)
static boolean	isSupplementaryCodePoint(int codepoint)
static boolean	isSurrogatePair(char high, char low)
static boolean	isValidCodePoint(int codepoint)
static char	reverseBytes(char c)
static char[]	toChars(int codepoint)
static int	toChars(int codepoint, char[] dst, int off)
static int	toCodePoint(char high, char low)
String	toString()
static String	toString(char c)
static Character	valueOf(char c)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

SIZE

public static final int SIZE

See Also:

Constant Field Values

MIN_RADIX

public static final int MIN_RADIX

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Constant Field Values

MAX_RADIX

public static final int MAX_RADIX

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Constant Field Values

MIN_VALUE

public static final char MIN_VALUE

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Constant Field Values

MAX_VALUE

public static final char MAX_VALUE

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Constant Field Values

MIN_HIGH_SURROGATE

public static final char MIN_HIGH_SURROGATE

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Constant Field Values

MAX_HIGH_SURROGATE

public static final char MAX_HIGH_SURROGATE

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Constant Field Values

MIN_LOW_SURROGATE

public static final char MIN_LOW_SURROGATE

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Constant Field Values

MAX_LOW_SURROGATE

public static final char MAX_LOW_SURROGATE

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Constant Field Values

MIN_SURROGATE

public static final char MIN_SURROGATE

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Constant Field Values

MAX_SURROGATE

public static final char MAX_SURROGATE

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Constant Field Values

MIN_CODE_POINT

public static final int MIN_CODE_POINT

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Constant Field Values

MIN_SUPPLEMENTARY_CODE_POINT

public static final int MIN_SUPPLEMENTARY_CODE_POINT

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Constant Field Values

MAX_CODE_POINT

public static final int MAX_CODE_POINT

See Also:

Constant Field Values

Constructor Detail

Character

public Character(char c)

Method Detail

charValue

public char charValue()

compareTo

public int compareTo(Character ob)

Description copied from interface: Comparable

Compares this with another Object. Returns -1 if this object is smaller, 0 if both objects are equal and 1 if this object is bigger.

Specified by:

compareTo in interface Comparable<Character>

Parameters:

ob - the object to compare with

Returns:

one of the values -1, 0, 1

codePointAt

public int codePointAt(char[] c,
                       int index)

codePointAt

public int codePointAt(char[] c,
                       int index,
                       int limit)

codePointAt

public int codePointAt(CharSequence c,
                       int index)

codePointBefore

public int codePointBefore(char[] c,
                           int index)

codePointBefore

public int codePointBefore(char[] c,
                           int index,
                           int start)

codePointBefore

public int codePointBefore(CharSequence c,
                           int index)

isDigit

public static boolean isDigit(char ch)

Identifies if a character is a numerical digit.

Parameters:

ch - the character

Returns:

true iff the character is a numerical digit

isLowSurrogate

public static boolean isLowSurrogate(char low)

isHighSurrogate

public static boolean isHighSurrogate(char high)

isSurrogatePair

public static boolean isSurrogatePair(char high,
                                      char low)

isValidCodePoint

public static boolean isValidCodePoint(int codepoint)

isSupplementaryCodePoint

public static boolean isSupplementaryCodePoint(int codepoint)

charCount

public static int charCount(int codepoint)

toChars

public static char[] toChars(int codepoint)

toChars

public static int toChars(int codepoint,
                          char[] dst,
                          int off)

toCodePoint

public static int toCodePoint(char high,
                              char low)

digit

public static int digit(char ch,
                        int radix)

This method accepts a character such as '7' or 'C' and converts it to a number value. So '7' returns 7 and 'C' returns 12, which is the hexidecimal value of C. You must specify a radix for the number system. If the digit is not defined for the specified radix or the radix is invalid, -1 is returned.

Parameters:

ch - the character

radix - the radix

Returns:

the numerical value of the digit

digit

public static int digit(int ch,
                        int radix)

equals

public boolean equals(Object o)

Overrides:

equals in class Object

forDigit

public static char forDigit(int digit,
                            int radix)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

toString

public static String toString(char c)

valueOf

public static Character valueOf(char c)

reverseBytes

public static char reverseBytes(char c)