why can't run!

i just learn java
write a applet..
but it can't show what i want...
can anyone help me?
import java.awt.*;
import javax.swing.*;
import java.awt.Event.*;
public class Jj extends JApplet{
public static int a;
public static int b;
public void init()
{
 a=Integer.parseInt(getParameter("Value1"));
 b=Integer.parseInt(getParameter("Value2"));
 Container cp=getContentPane();
 Buttonlistener bl=new Buttonlistener();
 cp.add(bl);
 show();
}
public class FillPanel2 extends JPanel{

 private int aa;
 private int bb;
 FillPanel2(int aa,int bb)
 {
  this.aa=aa;
  this.bb=bb;
 }
 public void paintComponment(Graphics g)
 {
  super.paintComponent(g);
  g.drawOval(aa,bb,80,30);
 }

}
public class FillPanel1 extends JPanel{

 private int aa;
 private int bb;

 FillPanel1(int aa,int bb)
 {
  this.aa=aa;
  this.bb=bb;
 }
 public void paintComponment(Graphics g)
 {
  super.paint(g);
  g.drawRect(aa,bb,80,30);
 }

}
public class Buttonlistener extends JPanel implements ActionListener{
    public void ButtonListener(){//=E6=9E=84=E9=80 =E5=87=BD=E6=95=B0
      Button b1=new Button("rect");
  Button b2=new Button("oval");
  Button b3=new Button("round");
  add(b1);
  add(b2);
  add(b3);
  b1.addActionListener(this);
  b2.addActionListener(this);
  b3.addActionListener(this);
    }
 public void actionPerformed(ActionEvent e) {

  String s=((Button)e.getSource()).getLabel() ;
  if(s.equals("rect"))
  {
   FillPanel1 fp =new FillPanel1(Jj.a,Jj.b);
      add(fp);
  }
  if(s.equals("oval"))
  {
   FillPanel2 fp=new FillPanel2(Jj.a,Jj.b );
   add(fp);
  }
  if(s.equals("round"))
  {
   FillPanel3 fp=new FillPanel3(Jj.a,Jj.b );
   add(fp);
   }
 }

}
public class FillPanel3 extends JPanel{

    private int aa;
    private int bb;
  public FillPanel3(int a, int b) {
                   aa=a;
                   bb=b;
  }
  public void paintComponent(Graphics g)
  {
   super.paint(g);
   g.drawOval( aa,bb,50,50);
  }
 }
}