这个程序错在哪里啊?

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;



public class lcd extends JFrame{

    

   

    JPanel p = new JPanel();    

    

    private JButton b1 = new JButton("Setup");

    private JButton b2 = new JButton("Hide");

    

    private Image icon;

    public lcd(){

        

    	

    	icon=Toolkit.getDefaultToolkit().getImage("1.gif");

        Container con = this.getContentPane();

        con.setLayout(null);

      

        

        b1.addActionListener(new ActionListener()

		{

			public void actionPerformed(ActionEvent e)

			{

				b1_button(e);

			}

		});

        b2.addActionListener(new ActionListener(){

        	

        	public void actionPerformed(ActionEvent e){

        		

        		b2_button(e);

        		

        	}

        	

        });

        

        

        p.setBackground(Color.BLACK);

        

        p.setBounds(0, 85, 400, 50);

        b1.setBounds(340, 0, 60, 40);

        b1.setBackground(Color.BLACK);

        b1.setForeground(Color.WHITE);

        b1.setBorder(null);

        

        

        

        b2.setBounds(280, 0, 60, 40);

        b2.setBackground(Color.BLACK);

        b2.setForeground(Color.WHITE);

        b2.setBorder(null);

        

        

        

        

        

        p.add(b2);

        

        

        p.setLayout(null);

        

        p.add(b1);

        

        con.add(p);

        

        con.setBackground(Color.WHITE);

        

        

    //   this.setIconImage(icon)



        

    }

    

    public void paint(Graphics g){

        super.paint(g);

        

        g.setColor(Color.RED);

        g.drawString("hello java", 0,40);

   

        

    }

    

    public void b1_button(ActionEvent e){

    	

    	



    	

    	

    	

    }

    

    

    public void b2_button(ActionEvent e){

    	



    	this.setState(1);

    	

    	

    }

    

    public static void main(String args[]){

        

        lcd  lc= new lcd();  

    

        

        lc.setSize(400,150);

        lc.setVisible(true);

        

        

    }

    



}