laf 的问题

[starlizhi]

import javax.swing.*;
import java.awt.event.*;
public class LAFTest extends JFrame{
	JMenuBar menuBar=new JMenuBar();
	JMenu menu=new JMenu("Theme");
	JMenuItem menuItemWin=new JMenuItem("Windows");
	JMenuItem menuItemMetal=new JMenuItem("Metal");
	JMenuItem menuItemBasic=new JMenuItem("Basic");
	JMenuItem menuItemMulti=new JMenuItem("Multi");
	JMenuItem menuItemSynth=new JMenuItem("Synth");
	public LAFTest(){
		menu.add(menuItemWin);
		menu.add(menuItemMetal);
		menu.add(menuItemBasic);
		menu.add(menuItemMulti);
		menu.add(menuItemSynth);
		menuBar.add(menu);
		menuItemWin.addActionListener(new WindowsAL());
		menuItemMetal.addActionListener(new MetalAl());
		menuItemBasic.addActionListener(new BasicAl());
		menuItemMulti.addActionListener(new MultiAl());
		menuItemSynth.addActionListener(new SynthAl());
		this.setJMenuBar(menuBar);
		this.setAlwaysOnTop(true);
		this.setTitle("LAFTest");
		this.setSize(400,250);
		this.setLocation(352,309);
		this.setVisible(true);
		this.setDefaultCloseOperation(3);
	}
	class WindowsAL implements ActionListener{
		public void actionPerformed(ActionEvent e){	
			try {
	    		UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
	    		SwingUtilities.updateComponentTreeUI(LAFTest.this);
			}
			catch (Exception ex) {
				ex.printStackTrace();
			}
			System.out.println("WindowsAL");
		}
	}
	class MetalAl implements ActionListener{
		public void actionPerformed(ActionEvent e){
			try {
	    		UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
	    		SwingUtilities.updateComponentTreeUI(LAFTest.this);
			}
			catch (Exception ex) {
				ex.printStackTrace();
			}
			System.out.println("MetalAL");
		}
	}
	class BasicAl implements ActionListener{
		public void actionPerformed(ActionEvent e){
			try {
	    		//UIManager.setLookAndFeel("javax.swing.plaf.basic.BasicLookAndFeel");
	    		SwingUtilities.updateComponentTreeUI(LAFTest.this);
			}
			catch (Exception ex) {
				ex.printStackTrace();
			}
			System.out.println("BasicAL");
		}
	}
	class MultiAl implements ActionListener{
		public void actionPerformed(ActionEvent e){
			try {
	    		//UIManager.setLookAndFeel("javax.swing.plaf.multi.MultiLookAndFeel");
	    		SwingUtilities.updateComponentTreeUI(LAFTest.this);
			}
			catch (Exception ex) {
				ex.printStackTrace();
			}
			System.out.println("MulitAL");
		}
	}
	class SynthAl implements ActionListener{
		public void actionPerformed(ActionEvent e){
			try {
	    		UIManager.setLookAndFeel("javax.swing.plaf.synth.SynthLookAndFeel");
	    		SwingUtilities.updateComponentTreeUI(LAFTest.this);
			}
			catch (Exception ex) {
				ex.printStackTrace();
			}
			System.out.println("SynthAL");
		}
	}
	public static void main (String[] args) {
		new LAFTest();
		System.out.println(UIManager.getLookAndFeel());
	}
}

为什么MultiLookAndFeel，和BasciLookAndFeel 会出现异常 但是其他的却没有什么事情呢？

[stevech]

MultiLookAndFeel，和BasciLookAndFeel都没有具体实现吧

[fool_leave]

异常是什么
这不是基本L&F,有很多可能
最好跟踪异常，查查报错的具体类是哪个
有些l&f做的不好，或者打包没打好，资源找不到也会出现异常的