Open only one frame

Question

Hi, I want to open a frame when I run an application. The problem is that that frame is opened always that I run the application, so you can have several opened frames.
How can I make to open only one frame, and that no frame is opened until I close the first one?
thanks

Answer 1

This is with useing a button
first class
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class ball extends JFrame implements ActionListener{
  ballball bebe = new ballball();
  public ball() {
  super("My button");
  setSize(400,400);
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  Container pane = getContentPane();
  FlowLayout flow = new FlowLayout();
  pane.setLayout(flow);
   pane.add(bebe.button);
  bebe.button.addActionListener(this);
  setContentPane(pane);
  setVisible(true);
  public void actionPerformed(ActionEvent me){
   Object ob = me.getSource();
   if(ob == bebe.button) {
     bebe.Myothergui();
     bebe.button.setEnabled(false);
public static void main(String[] args) {
     ball ba = new ball();
Second class
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class ballball {
   JFrame frame;
   JButton button = new JButton("my butto");
public void Myothergui() {
   frame = new JFrame();
  frame.setSize(300,300);
  frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                 button.setEnabled(true);
                frame.setVisible(false);
   frame.setVisible(true);
GOOD LUCK and learn to use the http://java.sun.com/j2se/1.4/docs/api/ most of your ? can be answered there.Anyways have a good one and STUDY STUDY STUDY