How to make progress bar in swing and making it stop the application when user close it?

How to make progress bar in swing and making it stop the application when user close it?

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package net.codejava.swing.download;

import java.awt.FlowLayout;

import javax.swing.JFrame;

import javax.swing.JProgressBar;

public class ProgressBarDemo extends JFrame{

              /**

        *

        */

       private static final long serialVersionUID = 1L;

              JProgressBar jb;

              int i = 0, num = 0;

              ProgressBarDemo() {

                     setTitle("Launching ");

                     jb = new JProgressBar(0, 1000);

                     jb.setBounds(30, 30, 150, 40);

                     jb.setValue(0);

                     jb.setStringPainted(true);

                     add(jb);

                     setSize(250, 150);

                     setLayout(new FlowLayout());

                     //close the progress bar and stop application processing when user click // on close button on title bar.

                     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

              }

              public void progress () {

                     while (i <= 1000) {

                         

                           jb.setValue(i);

                           i = i + 30;

                         

                           try {

                                  Thread.sleep(100);

                           } catch (Exception e) {

                           }

                     }

              }

              public static void main(String[] args) {

                     ProgressBarDemo m = new ProgressBarDemo();

                     m.setVisible(true);

                    

//                  closing the frame after 100%

                     m.dispose();

                    

              }

}

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Output: User can close this progress window and program will be stop immediately.