/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package java.lang;
import com.sun.cldc.i18n.uclc.*;
/**
* The Character class wraps a value of the primitive type <code>char</code>
* in an object. An object of type <code>Character</code> contains a
* single field whose type is <code>char</code>.
* <p>
* In addition, this class provides several methods for determining
* the type of a character and converting characters from uppercase
* to lowercase and vice versa.
*
* @version 1.60, 12/04/99 (CLDC 1.0, Spring 2000)
* @since JDK1.0
*/
public final class Character extends Object {
/**
* The minimum radix available for conversion to and from Strings.
*
* @see java.lang.Integer#toString(int, int)
* @see java.lang.Integer#valueOf(java.lang.String)
*/
public static final int MIN_RADIX = 2;
/**
* The maximum radix available for conversion to and from Strings.
*
* @see java.lang.Integer#toString(int, int)
* @see java.lang.Integer#valueOf(java.lang.String)
*/
public static final int MAX_RADIX = 36;
/**
* The constant value of this field is the smallest value of type
* <code>char</code>.
*
* @since JDK1.0.2
*/
public static final char MIN_VALUE = '\u0000';
/**
* The constant value of this field is the largest value of type
* <code>char</code>.
*
* @since JDK1.0.2
*/
public static final char MAX_VALUE = '\uffff';
/**
* The value of the Character.
*
* @serial
*/
private char value;
/**
* Constructs a <code>Character</code> object and initializes it so
* that it represents the primitive <code>value</code> argument.
*
* @param value value for the new <code>Character</code> object.
*/
public Character(char value) {
this.value = value;
}
/**
* Returns the value of this Character object.
* @return the primitive <code>char</code> value represented by
* this object.
*/
public char charValue() {
return value;
}
/**
* Returns a hash code for this Character.
* @return a hash code value for this object.
*/
public int hashCode() {
return (int)value;
}
/**
* Compares this object against the specified object.
* The result is <code>true</code> if and only if the argument is not
* <code>null</code> and is a <code>Character</code> object that
* represents the same <code>char</code> value as this object.
*
* @param obj the object to compare with.
* @return <code>true</code> if the objects are the same;
* <code>false</code> otherwise.
*/
public boolean equals(Object obj) {
if (obj instanceof Character) {
return value == ((Character)obj).charValue();
}
return false;
}
/**
* Returns a String object representing this character's value.
* Converts this <code>Character</code> object to a string. The
* result is a string whose length is <code>1</code>. The string's
* sole component is the primitive <code>char</code> value represented
* by this object.
*
* @return a string representation of this object.
*/
public String toString() {
char buf[] = {value};
return String.valueOf(buf);
}
/**
* Determines if the specified character is a lowercase character.
*
* @param ch the character to be tested.
* @return <code>true</code> if the character is lowercase;
* <code>false</code> otherwise.
* @since JDK1.0
*/
public static boolean isLowerCase(char ch) {
return caseConverter().isLowerCase(ch);
}
/**
* Determines if the specified character is an uppercase character.
*
* @param ch the character to be tested.
* @return <code>true</code> if the character is uppercase;
* <code>false</code> otherwise.
* @see java.lang.Character#isLowerCase(char)
* @see java.lang.Character#toUpperCase(char)
* @since 1.0
*/
public static boolean isUpperCase(char ch) {
return caseConverter().isUpperCase(ch);
}
/**
* Determines if the specified character is a digit.
*
* @param ch the character to be tested.
* @return <code>true</code> if the character is a digit;
* <code>false</code> otherwise.
* @since JDK1.0
*/
public static boolean isDigit(char ch) {
return caseConverter().isDigit(ch);
}
/**
* The given character is mapped to its lowercase equivalent; if the
* character has no lowercase equivalent, the character itself is
* returned.
*
* @param ch the character to be converted.
* @return the lowercase equivalent of the character, if any;
* otherwise the character itself.
* @see java.lang.Character#isLowerCase(char)
* @see java.lang.Character#isUpperCase(char)
* @see java.lang.Character#toUpperCase(char)
* @since JDK1.0
*/
public static char toLowerCase(char ch) {
return caseConverter().toLowerCase(ch);
}
/**
* Converts the character argument to uppercase; if the
* character has no lowercase equivalent, the character itself is
* returned.
*
* @param ch the character to be converted.
* @return the uppercase equivalent of the character, if any;
* otherwise the character itself.
* @see java.lang.Character#isLowerCase(char)
* @see java.lang.Character#isUpperCase(char)
* @see java.lang.Character#toLowerCase(char)
* @since JDK1.0
*/
public static char toUpperCase(char ch) {
return caseConverter().toUpperCase(ch);
}
/**
* Returns the numeric value of the character <code>ch</code> in the
* specified radix.
*
* @param ch the character to be converted.
* @param radix the radix.
* @return the numeric value represented by the character in the
* specified radix.
* @see java.lang.Character#isDigit(char)
* @since JDK1.0
*/
public static int digit(char ch, int radix) {
return caseConverter().digit(ch, radix);
}
static DefaultCaseConverter cc;
static DefaultCaseConverter caseConverter() {
if (cc != null) {
return cc;
}
String ccName = "?";
try {
/* Get the default encoding name */
ccName = System.getProperty("java.lang.Character.caseConverter");
if (ccName == null) {
ccName = "com.sun.cldc.i18n.uclc.DefaultCaseConverter";
}
/* Using the decoder names lookup a class to implement the reader */
Class clazz = Class.forName(ccName);
/* Return a new instance */
cc = (DefaultCaseConverter)clazz.newInstance();
} catch(Exception x) {
throw new RuntimeException(
/* #ifdef VERBOSE_EXCEPTIONS */
/// skipped "Cannot find case converter class "+ccName+" -> "+x.getMessage()
/* #endif */
);
}
return cc;
}
}
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