大家帮忙看看，java swing问题。

public class TwoL {



    public TwoL(java.util.List<BufferedImage> bim){

    	 final JDialog dlg=new JDialog((JFrame)null,true);

         JPanel imgPanel=new JPanel(new BorderLayout());

         JPanel cbPane=new JPanel(new GridLayout(0,2));

         for(int i=0;i < bim.size();i++){

             JLabel lb=new JLabel();

             lb.setIcon(new ImageIcon(bim.get(i)));

             JCheckBox cb=new JCheckBox("图片" + i);

             cbPane.add(lb);

             cbPane.add(cb);

         }

         JScrollPane sp=new JScrollPane(cbPane);

         imgPanel.add(sp,BorderLayout.CENTER);



         JPanel butPanel=new JPanel();

         JButton ok=new JButton("确定");

         ok.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent arg0) {

				System.exit(0);

			}

		});

         JButton cancel=new JButton("取消");

         cancel.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent arg0) {

				System.exit(0);

			}

		});

         butPanel.add(ok);

         butPanel.add(cancel);

         dlg.setUndecorated(true);

         dlg.add(imgPanel);

         dlg.add(butPanel,BorderLayout.SOUTH);

         dlg.setSize(350,300);

         dlg.setLocation(200,200);

         dlg.setVisible(true);

    }

    public static void main(String[] args) {

    	List<BufferedImage> bim = new ArrayList<BufferedImage>();

    	for(int i=0;i<10;i++){

    		bim.add(ImageCut.abscutImg("c:/c.jpg",0,i*20,100,40));    		

    	}

		new TwoL(bim);

	}