變換主題

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package cn.tsp2c.gui.event;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

/**
 *
 * @author Administrator
 */
public class PlafTest{
 public static void main(String[] args){
  PlatFrame pf = new PlatFrame();
  pf.setVisible(true);

 }
}

class PlatFrame extends JFrame{
 public PlatFrame(){
            setTitle("切換主題");
            setSize(400,300);
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 //創建面板對象，燃耗加入到窗體中

            PlafPanel plafPanel = new PlafPanel();
 add(plafPanel);

 }
}

//構建一個面板來放置按鈕對象
class PlafPanel extends JPanel{
 public PlafPanel(){
  UIManager.LookAndFeelInfo[] infos = UIManager.getInstalledLookAndFeels();
  for(UIManager.LookAndFeelInfo info : infos){
   //用每一種安裝的主題生成一個對應的按鈕，然後點擊每一個按鈕要切換到相應的主題
   String title = info.getName();
   String palfClazz = info.getClassName();
   makeButton(title,palfClazz);

  }
 }

 private void makeButton(String title,final String plafClazz){
 JButton btn = new JButton(title);
 add(btn);
 btn.addActionListener(new ActionListener(){

  public void actionPerformed(ActionEvent e){
   try{
    //當按鈕按下時，切換到相應的主題
    UIManager.setLookAndFeel(plafClazz);
    //刷新面板中的所有組件
    SwingUtilities.updateComponentTreeUI(PlafPanel.this);

   }catch (Exception ex){
    Logger.getLogger(PlafPanel.class.getName()).log(Level.SEVERE, null, ex);
   }
  }

  });
 }
}