java -Dswing.metalTheme=steel  packageName.ClassName

                
/*
 * @(#)AquaTheme.java	1.9 04/07/26
 * * Copyright (c) 2004 Sun Microsystems, Inc. All Rights Reserved.
 * * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions, and the following disclaimer.
 * * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions, and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 * * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS, AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING, OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT, OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL, OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * * You acknowledge that this software is not designed, licensed, or intended
 * for use in the design, construction, operation, or maintenance of any
 * nuclear facility.
 */
/*
 * @(#)AquaTheme.java	1.9 04/07/26
 */

import javax.swing.plaf.*;
import javax.swing.plaf.metal.*;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
/**
 * This class describes a theme using "blue-green" colors.
 *
 * 1.9 07/26/04
 * @author Steve Wilson
 */
public class AquaTheme extends DefaultMetalTheme {
    public String getName() { return "Aqua"; }
    private final ColorUIResource primary1 = new ColorUIResource(102, 153, 153);
    private final ColorUIResource primary2 = new ColorUIResource(128, 192, 192);
    private final ColorUIResource primary3 = new ColorUIResource(159, 235, 235);
    protected ColorUIResource getPrimary1() { return primary1; }
    protected ColorUIResource getPrimary2() { return primary2; }
    protected ColorUIResource getPrimary3() { return primary3; }
}

                
  SynthLookAndFeel synth = new SynthLookAndFeel();
  Class aClass = SynthTest.class;
  InputStream is = aClass.getResourceAsStream("file1.xml");
  synth.load(is, aClass);
  UIManager.setLookAndFeel(synth);

                
<synth>
  <style id="button">
    <font name="Monospaced" size="24" style="BOLD"/>
    <state value="MOUSE_OVER">
      <font name="Serif" size="48" style="ITALIC"/>
    </state>
  </style>
  <bind style="button" type="region" key="Button"/>
</synth>

                
import java.awt.EventQueue;
import java.io.InputStream;
import java.text.ParseException;
import javax.swing.JButton;
import javax.swing.JFrame;
import static javax.swing.JFrame.*;
import javax.swing.UIManager;
import javax.swing.plaf.synth.SynthLookAndFeel;
public class SynthTest {
  public static void main(String args[]) {
    Runnable runner = new Runnable() {
      public void run() {
        SynthLookAndFeel synth = new SynthLookAndFeel();
        try {
          Class aClass = SynthTest.class;
          InputStream is = aClass.getResourceAsStream("file1.xml");
          if (is == null) {
            System.err.println("Unable to find theme configuration");
            System.exit(-1);
          }
          synth.load(is, aClass);
        } catch (ParseException e) {
          System.err.println("Unable to load theme configuration");
          System.exit(-2);
        }
        try {
          UIManager.setLookAndFeel(synth);
        } catch (javax.swing.UnsupportedLookAndFeelException e) {
          System.err.println("Unable to change look and feel");
          System.exit(-3);
        }
        JFrame frame = new JFrame("Tester");
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        JButton button = new JButton("Hello, World");
        frame.add(button);
        frame.setSize(400, 200);
        frame.setVisible(true);
      }
    };
    EventQueue.invokeLater(runner);
  }
}