source: branches/2.2/jabberit_messenger/java_source/src/nu/fw/jeti/util/Utils.java @ 3102

/* 
 *      Jeti, a Java Jabber client, Copyright (C) 2001 E.S. de Boer  
 *
 *  This program 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 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *      For questions, comments etc, 
 *      use the website at http://jeti.jabberstudio.org
 *  or mail/IM me at jeti@jabber.org
 *  
 *  Created on 17-jun-2005
 */

package nu.fw.jeti.util;

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;

import javax.swing.*;

/**
 * @author E.S. de Boer
 *
 */
public class Utils
{
        public static String toString(byte[] bytes)
        {
                StringBuffer buf = new StringBuffer(bytes.length * 2);
                for(int i = 0; i < bytes.length; i++)
                {
                        int hex = bytes[i];
                        if (hex < 0) hex = 256 + hex;
                        if (hex >=16) buf.append(Integer.toHexString(hex));
                        else
                        {
                                buf.append('0');
                                buf.append(Integer.toHexString(hex));
                        }
                }
                return buf.toString().toLowerCase();
        }
        
        public static void addCancelButton(RootPaneContainer rpc,JButton button,Action cancelAction)
        {
                button.setAction(cancelAction);
                KeyStroke stroke = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
                JLayeredPane layeredPane = rpc.getLayeredPane();
                layeredPane.getActionMap().put("cancel", cancelAction);
                layeredPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(stroke, "cancel");
        }
        
        /**
         * Is the JRE Jeti runs on at least version version
         * @param version the minimum version needed
         *                                version can be 5 or 6
         */
        public static boolean isAtleastJava(int version)
        {
                String versionString = System.getProperty("java.version");
                if (versionString.startsWith("1.4"))
                {
                        return false;
                }
                if (versionString.startsWith("1.5"))
                {
                        if(version==5) return true;
                        else return false;
                }
                return true;
        }
}