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Java in a Nutshell

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The java.lang Package
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25.7 java.lang.Character (JDK 1.0)

This class provides an immutable object wrapper around the primitive char data type. charValue() returns the char value of a Character object. A number of class methods provide the Java/Unicode equivalent of the C <ctype.h> character macros for checking the type of characters and converting to uppercase and lowercase letters. getType() returns the character type. The return value is one of the constants defined by the class, which represents a number of broad Unicode character categories.

digit() returns the integer equivalent of a given character for a given radix (e.g., radix 16 for hexadecimal). forDigit() returns the character that corresponds to the specified value for the specified radix.

public final class Character extends Object implements Serializable {
    // Public Constructor
            public Character(char value);
    // Constants
            public static final int MAX_RADIX, MIN_RADIX;
            public static final char MAX_VALUE, MIN_VALUE;
        1.1public static final Class TYPE;
    // Character Type Constants
        1.1public static final byte COMBINING_SPACING_MARK, CONNECTOR_PUNCTUATION, CONTROL;
        1.1public static final byte CURRENCY_SYMBOL, DASH_PUNCTUATION, DECIMAL_DIGIT_NUMBER;
        1.1public static final byte ENCLOSING_MARK, END_PUNCTUATION, FORMAT;
        1.1public static final byte LETTER_NUMBER, LINE_SEPARATOR, LOWERCASE_LETTER;
        1.1public static final byte MATH_SYMBOL, MODIFIER_LETTER, MODIFIER_SYMBOL;
        1.1public static final byte NON_SPACING_MARK, OTHER_LETTER, OTHER_NUMBER;
        1.1public static final byte OTHER_PUNCTUATION, OTHER_SYMBOL, PARAGRAPH_SEPARATOR;
        1.1public static final byte PRIVATE_USE, SPACE_SEPARATOR, START_PUNCTUATION;
        1.1public static final byte SURROGATE, TITLECASE_LETTER, UNASSIGNED;
        1.1public static final byte UPPERCASE_LETTER;
    // Class Methods
            public static int digit(char ch, int radix);
            public static char forDigit(int digit, int radix);
        1.1public static int getNumericValue(char ch);
        1.1public static int getType(char ch);
            public static boolean isDefined(char ch);
            public static boolean isDigit(char ch);
        1.1public static boolean isISOControl(char ch);
        1.1public static boolean isIdentifierIgnorable(char ch);
        1.1public static boolean isJavaIdentifierPart(char ch);
        1.1public static boolean isJavaIdentifierStart(char ch);
        #   public static boolean isJavaLetter(char ch);
        #   public static boolean isJavaLetterOrDigit(char ch);
            public static boolean isLetter(char ch);
            public static boolean isLetterOrDigit(char ch);
            public static boolean isLowerCase(char ch);
        #   public static boolean isSpace(char ch);
        1.1public static boolean isSpaceChar(char ch);
            public static boolean isTitleCase(char ch);
        1.1public static boolean isUnicodeIdentifierPart(char ch);
        1.1public static boolean isUnicodeIdentifierStart(char ch);
            public static boolean isUpperCase(char ch);
        1.1public static boolean isWhitespace(char ch);
            public static char toLowerCase(char ch);
            public static char toTitleCase(char ch);
            public static char toUpperCase(char ch);
    // Public Instance Methods
            public char charValue();
            public boolean equals(Object obj);  // Overrides Object
            public int hashCode();  // Overrides Object
            public String toString();  // Overrides Object
}


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