How to make objects appear in an applet

Question

I have to do a program for school wich shows a switch,
it can have 2 possible positions and a light burning green/yellow for on/off...
I tried this and didnt get any messages/warnings:
package wissel;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class wissel extends Applet {
Button knop1, knop2;
public void init()
{ setLayout(null);
knop1 = new Button( "Rechtdoor" );
knop2 = new Button( "Afbuigend" );
knop1.setBounds(150,450,100,25);
knop2.setBounds(250,450,100,25);
add( knop1 );
add( knop2 );
public void paint( Graphics g )
g.setColor( Color.black );
g.fillOval( 350, 40, 150, 150 );
g.fillRect( 412, 180, 25, 250 );
g.fillArc(100, 380, 188, 100, 0, 180);
public boolean action( Event e, Object o, Graphics g )
if( e.target == knop1 )
g.setColor( Color.green );
g.fillOval( 375, 65, 100, 100 );
g.setColor( Color.black );
g.fillRect( 100, 200, 50, 180 );
return true;
if( e.target == knop2 )
g.setColor( Color.yellow );
g.fillOval( 375, 65, 100, 100 );
g.setColor( Color.black );
g.fillRect( 150, 380, 100, 200 );
return true;
return false;
But this doesn't show anything when I click on button 1 or 2 the screen stays like it is...
Could someone help me with solving/identifying the problem???????
Thanks a lot,
Menno.

Answer 1

package wissel;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class wissel extends Applet {
Button knop1, knop2;
private boolean rechtdoor, afbuigend;
     public void init()
     {   setLayout(null);
rechtdoor=true;
afbuigend=false;
     knop1 = new Button( "Rechtdoor" );
     knop2 = new Button( "Afbuigend" );
     knop1.setBounds(150,450,100,25);
knop2.setBounds(250,450,100,25);
          add( knop1 );
          add( knop2 );
public void paint( Graphics g )
g.setColor( Color.black );
g.fillOval( 350, 40, 150, 150 );
g.fillRect( 412, 180, 25, 250 );
g.fillArc(100, 380, 188, 100, 0, 180);
public void paint( Event e, Graphics g )
{ if( e.target == knop1 )
          {       rechtdoor=true;
afbuigend=false;
g.setColor( Color.green );
g.fillOval( 375, 65, 100, 100 );
g.setColor( Color.black );
     g.fillRect( 100, 200, 50, 180 );
repaint();
          if( e.target == knop2 )
          {       afbuigend=true;
rechtdoor=false;
g.setColor( Color.yellow );
g.fillOval( 375, 65, 100, 100 );
g.setColor( Color.black );
g.fillRect( 150, 380, 100, 200 );
repaint();
class wisselstaf {
     public void teken( Graphics g ) {
     g.setColor( Color.green );
g.fillOval( 375, 65, 100, 100 );
g.setColor( Color.black );
     g.fillRect( 100, 200, 50, 180 );
Please!
HELP ME!!!
This is killing me for days now!!!