Java tutorial
//package com.java2s; /******************************************************************************* * Copyright (c) 2008 flowr.org - all rights reserved. This program and the accompanying materials are made available * under the terms of the Eclipse Public License (EPL) v1.0. The EPL is available at * http://www.eclipse.org/legal/epl-v10.html * Contributors: flowr.org - initial API and implementation ******************************************************************************/ import java.util.Comparator; public class Main { public static <T> Comparator<T> identityComparator() { return new Comparator<T>() { @Override public int compare(T o1, T o2) { return System.identityHashCode(o1) - System.identityHashCode(o2); } }; } }