这个程序小弟我想菜单中选择图片1的时候显示001.jsp但是显示不出来,请帮忙看下,多谢

package org.gui;import java.awt.Frame;import java.awt.Image;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class TestMenu extends Frame{    /**     * @param args     */    MenuBar mb = new MenuBar();    Menu m = new Menu("File");    Menu m1 = new Menu("Start");    MenuItem mi1 = new MenuItem("图片1");    MenuItem mi2 = new MenuItem("图片2");    public TestMenu(){        this.addWindowListener(new WindowAdapter(){            public void windowClosing(WindowEvent e){                setVisible(false);                System.exit(0);            }        });        this.setSize(400,400);        mb.add(m);        m.add(m1);        m1.add(mi1);        m1.add(mi2);        MenuListener ml = new MenuListener(this);        mi1.addActionListener(ml);        mi2.addActionListener(ml);        this.setMenuBar(mb);        this.setVisible(true);    }    public static void main(String[] args) {        // TODO Auto-generated method stub        new TestMenu();    }}class MenuListener implements ActionListener{    TestMenu tm = null;    Image im = null;    public MenuListener(TestMenu tm){        this.tm = tm;    }    public void actionPerformed(ActionEvent arg0) {        // TODO Auto-generated method stub        if(arg0.getActionCommand().equals("图片1")){            System.out.println("1111");            im = tm.getToolkit().getImage("d:/001.jsp");            System.out.println(im==null);            while(!tm.getGraphics().drawImage(im, 20, 20, tm)){                tm.getGraphics().drawImage(im, 20, 20, tm);            }        }else if(arg0.getActionCommand().equals("图片2")){            System.out.println("22222");            im = tm.getToolkit().getImage("d:/002.jsp");            System.out.println(im==null);            while(!tm.getGraphics().drawImage(im, 20, 20, tm)){                tm.getGraphics().drawImage(im, 20, 20, tm);            }        }    }    }

/** * <p>Title: </p> * * <p>Description: </p> * * <p>Copyright: Copyright (c) 2009</p> * * <p>Company: </p> * * @author not attributable * @version 1.0 */import java.awt.Frame;import java.awt.Image;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JPanel;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.File;import javax.imageio.ImageIO;import java.io.IOException;import javax.swing.JFrame;import java.awt.Graphics2D;public class TestMenu extends JFrame{  public static void main(String[] args) {      // TODO Auto-generated method stub      new TestMenu();    }    /**     * @param args     */    String filename ;    MenuBar mb = new MenuBar();    Menu m = new Menu("File");    Menu m1 = new Menu("Start");    MenuItem mi1 = new MenuItem("图片1");    MenuItem mi2 = new MenuItem("图片2");    public TestMenu(){        /*this.addWindowListener(new WindowAdapter(){            public void windowClosing(WindowEvent e){                setVisible(false);                System.exit(0);            }        });*/        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        this.setSize(400,400);        this.setContentPane(new PicPanel());                mb.add(m);        m.add(m1);        m1.add(mi1);        m1.add(mi2);        MenuListener ml = new MenuListener(this);        mi1.addActionListener(ml);        mi2.addActionListener(ml);        this.setMenuBar(mb);        this.setVisible(true);    }        public void updateImg(String filename){      this.filename = filename;      repaint();    }                class PicPanel extends JPanel{      public void paintComponent(Graphics g){        if(filename==null || filename.length()==0){          super.paintComponent(g);          return;        }        try{          BufferedImage img = ImageIO.read(new File(filename));          Graphics2D g2d = (Graphics2D)g;          g2d.drawImage(img,0,0,img.getWidth(),img.getHeight(),null);        }catch(IOException e){}      }    }}class MenuListener implements ActionListener{    TestMenu tm = null;    Image im = null;    public MenuListener(TestMenu tm){        this.tm = tm;    }    public void actionPerformed(ActionEvent arg0) {        if(arg0.getActionCommand().equals("图片1")){          tm.updateImg("d:/001.jsp");        }else if(arg0.getActionCommand().equals("图片2")){          tm.updateImg("d:/002.jsp");        }    }}