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Class ObjectIdentityWrapper


public class ObjectIdentityWrapper
extends Object

This class is a thin wrapper around Object that makes the methods hashCode() and equals(Object) as discriminating as possible.

Field Summary

Object
object
The Object wrapped by this ObjectIdentityWrapper.

Constructor Summary

ObjectIdentityWrapper(Object o)
Constructs a ObjectIdentityWrapper that is wrapped around o.

Method Summary

boolean
equals(Object o)
Uses the == operator to test for equality between the object wrapped by this ObjectIdentityWrapper and the object wrapped by the ObjectIdentityWrapper o.
int
hashCode()
Uses System.identityHashCode(Object) to compute a hash code for the object wrapped by this ObjectIdentityWrapper.
String
toString()
Convert this Object to a human-readable String.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

object

public Object object
The Object wrapped by this ObjectIdentityWrapper.

Constructor Details

ObjectIdentityWrapper

public ObjectIdentityWrapper(Object o)
Constructs a ObjectIdentityWrapper that is wrapped around o.

Method Details

equals

public boolean equals(Object o)
Uses the == operator to test for equality between the object wrapped by this ObjectIdentityWrapper and the object wrapped by the ObjectIdentityWrapper o. Returns false if o is not a ObjectIdentityWrapper.
Overrides:
equals in interface Object
See Also:
Hashtable, java.lang.Object.equals()

hashCode

public int hashCode()
Uses System.identityHashCode(Object) to compute a hash code for the object wrapped by this ObjectIdentityWrapper.
Overrides:
hashCode in interface Object

toString

public String toString()
Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() and such.

It is typical, but not required, to ensure that this method never completes abruptly with a RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

Overrides:
toString in interface Object
Returns:
the String representing this Object, which may be null

ObjectIdentityWrapper.java -- Wrapper class used to override equals() and hashCode() to be as discriminating as possible Copyright (C) 1998 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath 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 for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.