Class java.lang.Character
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Class java.lang.Character
java.lang.Object
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+----java.lang.Character
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public final class
Character
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extends Object
The Character class provides an object wrapper for Character data values
and serves as a place for character-oriented operations. A wrapper is useful
because most of Java's utility classes require the use of objects. Since characters
are not objects in Java, they need to be "wrapped" in a Character instance.
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Version:
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1.25, 08/17/95
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Author:
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Lee Boynton
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MAX_RADIX
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The maximum radix available for conversion to and from Strings.
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MIN_RADIX
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The minimum radix available for conversion to and from Strings.
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Character(char)
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Constructs a Character object with the specified value.
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charValue()
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Returns the value of this Character object.
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digit(char, int)
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Returns the numeric value of the character digit using the specified
radix.
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forDigit(int, int)
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Returns the character value for the specified digit in the specified
radix.
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isDigit(char)
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Determines if the specified character is a ISO-LATIN-1 digit.
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isLowerCase(char)
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Determines if the specified character is ISO-LATIN-1 lower case.
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isSpace(char)
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Determines if the specified character is ISO-LATIN-1 white space according to Java.
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isUpperCase(char)
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Determines if the specified character is ISO-LATIN-1 upper case.
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toLowerCase(char)
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Returns the lower case character value of the specified ISO-LATIN-1
character.
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toString()
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Returns a String object representing this character's value.
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toUpperCase(char)
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Returns the upper case character value of the specified ISO-LATIN-1
character.
MIN_RADIX
public final static int MIN_RADIX
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The minimum radix available for conversion to and from Strings.
The lowest minimum value that a radix can be is 2.
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See Also:
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toString
MAX_RADIX
public final static int MAX_RADIX
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The maximum radix available for conversion to and from Strings. The
largest maximum value that a radix can have is 36.
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See Also:
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toString
Character
public Character(char value)
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Constructs a Character object with the specified value.
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Parameters:
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value
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value of this Character object
isLowerCase
public static boolean isLowerCase(char ch)
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Determines if the specified character is ISO-LATIN-1 lower case.
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Parameters:
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ch
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the character to be tested
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Returns:
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true if the character is lower case; false otherwise.
isUpperCase
public static boolean isUpperCase(char ch)
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Determines if the specified character is ISO-LATIN-1 upper case.
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Parameters:
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ch
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the character to be tested
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Returns:
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true if the character is upper case; false otherwise.
isDigit
public static boolean isDigit(char ch)
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Determines if the specified character is a ISO-LATIN-1 digit.
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Parameters:
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ch
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the character to be tested
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Returns:
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true if this character is a digit; false otherwise.
isSpace
public static boolean isSpace(char ch)
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Determines if the specified character is ISO-LATIN-1 white space according to Java.
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Parameters:
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ch
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the character to be tested
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Returns:
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true if the character is white space; false otherwise.
toLowerCase
public static char toLowerCase(char ch)
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Returns the lower case character value of the specified ISO-LATIN-1
character. Characters that are not upper case letters are returned
unmodified.
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Parameters:
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ch
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the character to be converted
toUpperCase
public static char toUpperCase(char ch)
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Returns the upper case character value of the specified ISO-LATIN-1
character.
Characters that are not lower case letters are returned unmodified.
Note that German ess-zed and latin small letter y diaeresis have no
corresponding upper case letters, even though they are lower case.
There is a capital y diaeresis, but not in ISO-LATIN-1...
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Parameters:
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ch
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the character to be converted
digit
public static int digit(char ch,
int radix)
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Returns the numeric value of the character digit using the specified
radix. If the character is not a valid digit, it returns -1.
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Parameters:
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ch
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the character to be converted
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radix
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the radix
forDigit
public static char forDigit(int digit,
int radix)
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Returns the character value for the specified digit in the specified
radix. If the digit is not valid in the radix, the 0 character
is returned.
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Parameters:
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digit
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the digit chosen by the character value
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radix
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the radix containing the digit
charValue
public char charValue()
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Returns the value of this Character object.
toString
public String toString()
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Returns a String object representing this character's value.
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Overrides:
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toString in class Object
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