If statement in paint

Question

Can anyone help.using eventlistener ,with CheckboxeGroup,I,m trying to put a if statement in paint so when I select the
Checkbox it paints, seems simple, but been at it for days cannot suss it.
Any help appreciated
THANK YOU

Answer 1

Since you have some code allready this was my version:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Painting extends Panel implements ActionListener{
     public static final int ON  = 0;
     public static final int OFF = 1;
     private int flag = ON;
     public Painting(){          
          JCheckBox checkBox = new JCheckBox();          
          checkBox.addActionListener(this);
          JFrame frame  = new JFrame();
          frame.getContentPane().add(checkBox,BorderLayout.NORTH);
          frame.getContentPane().add(this,BorderLayout.CENTER);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.setSize(100,150);
          frame.setVisible(true);     
     public void actionPerformed(ActionEvent e){     
          if(flag==ON){
               flag= OFF;
          }else{
               flag=ON;
          repaint();
     public void paint(Graphics g){
          switch(flag){
          case OFF:
               g.fillRect(20,20,50,50);
               break;
          case ON:
               g.fillOval(20,20,50,50);
               break;
     public static void main(String[] args){
          new Painting();
}