Here you can find the source of versionCompare(String userVersion, String supportVersion)
public static boolean versionCompare(String userVersion, String supportVersion)
//package com.java2s; /**//w w w . j a v a 2 s .c o m * $Revision: 13635 $ * $Date: 2013-05-04 02:55:48 -0500 (Sat, 04 May 2013) $ * * Copyright (C) 2004-2008 Jive Software. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { public static boolean versionCompare(String userVersion, String supportVersion) { boolean isSupport = false; try { if (userVersion != null) { String[] userVerArr = userVersion.split("\\."); String[] supportVerArr = supportVersion.split("\\."); int userVerNum = 0, supportVerNum = 0; if (userVerArr.length > 2) { userVerNum = Integer.valueOf(userVerArr[0]) * 100000 + Integer.valueOf(userVerArr[1]) * 100 + Integer.valueOf(userVerArr[2]); supportVerNum = Integer.valueOf(supportVerArr[0]) * 100000 + Integer.valueOf(supportVerArr[1]) * 100 + Integer.valueOf(supportVerArr[2]); } else if (userVerArr.length > 1) { userVerNum = Integer.valueOf(userVerArr[0]) * 100000 + Integer.valueOf(userVerArr[1]) * 100; supportVerNum = Integer.valueOf(supportVerArr[0]) * 100000 + Integer.valueOf(supportVerArr[1]) * 100; } isSupport = userVerNum >= supportVerNum; } } catch (Exception e) { } return isSupport; } }