Controlling A Loop With Buttons

Question

Basically I need start and stop buttons for my loop which is in the main method. I figured I would use a boolean variable whose value is changed by the click of the buttons in a while statement. The problem is the loop is never started. So I must be following the wrong procedure. I would appreciate any help.

Answer 1

This is part of the code
public class MyClass extends JFrame implements ActionListener{
private JButton start, stop;
private boolean test;
.....//other variables
public MyClass() {
...initialize other variables
        test = false;
           setTitle("My Class");
           setLayout(new BorderLayout());
           grd = new MyGrid(W,H);
           add(grd);
     JPanel p = new JPanel();
     p.add(start = new JButton("Start"));
           p.add(quit = new JButton("Quit"));
           p.add(stop = new JButton("Stop"));
           add("South",p);
//My actionPerformed Looks like this
public void actionPerformed (ActionEvent e) {
        String s = e.getActionCommand();
        if ("Start".equals(s)) {
            flag= true;
        } else if ("Stop".equals(s)) {
            flag = false;
//...other methods
public  static void main(String []args){
          MyClass frame = new MyClass();
          JFrame.setDefaultLookAndFeelDecorated(true);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                 frame.setSize(FRAME_WIDTH,FRAME_HEIGHT);
                 frame.setVisible(true);
       while(frame.test == true){
         ///do the loop stuff
}//end main
}//end MyClass