在jbuilder中如何动态改变窗体风格

Question

后面 要加上这个话！SwingUtilities.updateComponentTreeUI(getContentPane());

Answer 1

SwingUtilities.updateComponentTreeUI(getContentPane());
好像不行。
我的代码为：
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */public class Frame7 extends JFrame {
  private JPanel jPanel1 = new JPanel();
  private JToggleButton jToggleButton1 = new JToggleButton();
  private JPanel jPanel2 = new JPanel();
  private JTabbedPane jTabbedPane1 = new JTabbedPane();
  private JPanel jPanel3 = new JPanel();
  private JToggleButton jToggleButton2 = new JToggleButton();
  private JLabel jLabel1 = new JLabel();
  private BorderLayout borderLayout1 = new BorderLayout();  public Frame7() {
    setSize(500,400);    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    Frame7 frame7 = new Frame7();
    frame7.show();
  }
  private void jbInit() throws Exception {
    jToggleButton1.setText("jToggleButton1");
    jToggleButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jToggleButton1_actionPerformed(e);
      }
    });
    jToggleButton2.setText("jToggleButton2");
    jLabel1.setText("test ");
    jPanel2.setLayout(borderLayout1);
    this.getContentPane().add(jPanel1, BorderLayout.SOUTH);
    jPanel1.add(jToggleButton1, null);
    this.getContentPane().add(jPanel2, BorderLayout.CENTER);
    jPanel2.add(jTabbedPane1,  BorderLayout.CENTER);
    jTabbedPane1.add(jPanel3,  "jPanel3");
    jPanel3.add(jLabel1, null);
    jPanel3.add(jToggleButton2, null);
  }
 public void paintComponents(Graphics g)
 {
   super.paintComponents(g); }
  void jToggleButton1_actionPerformed(ActionEvent e) {    try
      {      UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
      SwingUtilities.updateComponentTreeUI(getContentPane());
      this.paintComponents(this.getContentPane().getGraphics());
      }
      catch(Exception ev)
      {
      ev.printStackTrace();
    }  }
}