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/* Copyright (C) 1998, 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
package java.lang;
import java.io.Serializable;
/**
* @author Warren Levy <warrenl@cygnus.com>
* @date September 3, 1998.
*/
/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
* "The Java Language Specification", ISBN 0-201-63451-1
* plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
* Status: Believed complete and correct.
*/
public final class Boolean extends Object implements Serializable
{
public static final Boolean FALSE = new Boolean(false);
public static final Boolean TRUE = new Boolean(true);
// This initialization is seemingly circular, but it is accepted
// by javac, and is handled specially by gcc.
public static final Class TYPE = boolean.class;
/* The boolean value of the instance. */
private boolean value;
public Boolean(boolean boolVal)
{
value = boolVal;
}
public Boolean(String strVal)
{
value = strVal.equalsIgnoreCase("true");
}
public boolean booleanValue()
{
return value;
}
public boolean equals(Object obj)
{
/* Don't need to compare obj to null as instanceof will do this. */
if (obj instanceof Boolean)
return value == ((Boolean) obj).value;
return false;
}
public static boolean getBoolean(String property)
{
/* TBD: If a security manager exists and it doesn't permit accessing
* the property, it will throw an exception. Should we catch it?
*/
try
{
String val = System.getProperty(property);
return val == null ? false : val.equalsIgnoreCase("true");
}
catch (SecurityException e)
{
return false;
}
}
public int hashCode()
{
/* These values are from the Java Lang. Spec. (Sec 20.4.7).
* TBD: They could be made private static final fields but they're only
* used here (and shouldn't be used anywhere else), though it might be
* useful to grep on something like JAVA_HASH_* values for us as
* developers.
*/
return value ? 1231 : 1237;
}
public String toString()
{
return value ? "true" : "false";
}
public static Boolean valueOf(String str)
{
/* This returns a Boolean (big B), not a boolean (little b). */
return str.equalsIgnoreCase("true") ? TRUE : FALSE;
}
}
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