wrapper.java

The WLAN Traffic Visualizer is a platform independent Java program providing accurate measurement of

package main;

//Copyright (C) 2008 Harald Unander
//
//    This file is part of WlanTV.
//
//    WlanTV 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 3 of the License, or
//    (at your option) any later version.
//
//    WlanTV 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 WlanTV.  If not, see <http://www.gnu.org/licenses/>.

import javax.swing.JOptionPane;

/**
 * The purpose of this class is to check the Java version
 * and start the program if Java version is ok.
 * 
 * It is compiled to run on JRE 1.2 or newer.
 * 
 * @author harald
 *
 */
public class Wrapper {
	public static void main(String[] args) {
		checkJavaVersion();
		Main.main(args);
	}

	private static void checkJavaVersion() {
		String version = System.getProperty("java.version");
		String v[] = version.split("\\.");
		System.out.println("Java version "+ version + " found");
		int major = 0;
		int minor = 0;
		
		try {
			major = Integer.parseInt(v[0]);
			minor = Integer.parseInt(v[1]);
		}
		catch (Exception e) {
			e.printStackTrace();
		}
		
		if(minor < 6 || major < 1) {
			JOptionPane.showMessageDialog(
					null,
					"Java version "+ version + " found\n\n"+
					"Java JRE 1.6 or higher is required to run this program",
					"Error",
					JOptionPane.ERROR_MESSAGE);
			System.exit(-1);
		}
	}

}