Here you can find the source of difference(Integer value1, Integer value2)
public static int difference(Integer value1, Integer value2)
//package com.java2s; /**/*from w w w.j a v a2 s .co m*/ * Copyright (c) 2000-present Liferay, Inc. All rights reserved. * * This library is free software; you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the Free * Software Foundation; either version 2.1 of the License, or (at your option) * any later version. * * This library 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 Lesser General Public License for more * details. */ public class Main { public static int difference(Integer value1, Integer value2) { return value1 - value2; } }