Re: Problem in reloading a JFrame

Ok, finally I have made the SSCCE, you can try it now and tell me what
is the problem...

What I am doing in this piece of code is that I am displaying initially
a button with text "start", on pressing the reload button the text
should alternately change from "dony" and "pony", try maximizing the
applet to see the problem.
Can anyone tell me now what to do.

I am in desperate need of help!!

TIA

Rohit

/*Launch.java*/

package javaapplication1;

public class Launch {

    public static void main(String args[]){

        Viewer view = new Viewer("start");
        view.displayFrame();
        view.displayResults();
    }
}

/*Viewer.java*/

package javaapplication1;

import javax.swing.JFrame;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Button;
import java.awt.Panel;
import java.awt.Frame;

class Viewer implements ActionListener {

    private String str;
    private Button reload;
    private JFrame mainFrame;
    private Jbit jc;
    boolean flag = true;

    public Viewer (String str) {
    this.str = str;
    }

    public void displayFrame() {

    mainFrame = new JFrame("MODEL VIEWER");
    mainFrame.setLocation(200, 100);
        mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public void updateModel(String str) {

    this.str = str;
    }
    public void displayResults () {

    jc = new Jbit(str);
    mainFrame.getContentPane().setLayout(new BorderLayout());
    mainFrame.getContentPane().add("Center", jc);

    reload = new Button("Reload");
    reload.addActionListener(this);
    Panel p = new Panel();
    p.add(reload);
    mainFrame.getContentPane().add("South", p);

    mainFrame.pack();
    mainFrame.setSize(600,600);
    mainFrame.setVisible(true);

    //Default view
    }

    public void refreshResults(String str) {

     jc = new Jbit(str);
    mainFrame.setSize(mainFrame.getSize().width,
mainFrame.getSize().height);
    mainFrame.getContentPane().add("Center", jc);
        mainFrame.invalidate();
        mainFrame.validate();
    mainFrame.setVisible(true);
    }

    public void actionPerformed(ActionEvent ae) {
    String cmd = ae.getActionCommand();
    if (cmd.equals("Reload")) {
                if(flag){
                    refreshResults("pony");
                    flag = false;
                }
                else {
                    refreshResults("dony");
                    flag = true;
                }
        jc.validate();
        }

    }

}

/*Jbit.java*/

package javaapplication1;

import java.applet.Applet;
import java.awt.Button;
import java.awt.BorderLayout;

public class Jbit extends Applet {

    private String str;
    private Button button1;

    //Applet started with a model
     public Jbit (String str) {
        this.str = str;
    init();
     }

    public void init() {
        setLayout(new BorderLayout());
        button1 = new Button(str);
        add(button1);
    }

    public void start () {

    repaint();
    }

    public String getString () {
    
     return str;

    }
}