The use of progress bar in Java Swing (simple version)

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1. /** 
2.  * The use of progress bar in java swing 
3.  * @author gao 
4.  */  
5. package  com.gao;  
6.   
7. import java.awt.FlowLayout;  
8.   
9. import javax.swing.JFrame;  
10. import javax.swing.JPanel;  
11. import javax.swing.JProgressBar;  
12. import javax.swing.border.EmptyBorder;  
13.   
14. publicclass JProgressBarDemo extends JFrame {   
15.     public JProgressBarDemo(){  
16.         this .setTitle( "Use of progress bar" );  
17.         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
18.         this.setBounds(100, 100, 250, 100);  
19.         JPanel contentPane=new JPanel();  
20.         contentPane.setBorder(new EmptyBorder(5,5,5,5));  
21.         this.setContentPane(contentPane);  
22.         contentPane.setLayout(new FlowLayout(FlowLayout.CENTER,5,5));  
23.         final JProgressBar progressBar=new JProgressBar();  
24.         progressBar.setStringPainted(true);  
25.         new Thread(){  
26.             publicvoid run(){   
27.                 for(int i=0;i<=100;i++){  
28.                     try{  
29.                         Thread.sleep(100);  
30.                     }catch(InterruptedException e){  
31.                         e.printStackTrace ();  
32.                     }  
33.                       progressBar.setValue(i);  
34.                 }  
35.                 progressBar.setString( "Upgrade complete!" );  
36.             }  
37.         }.start();  
38.         contentPane.add(progressBar);  
39.         this.setVisible(true);  
40.     }  
41.     publicstaticvoid main(String[]args){    
42.         JProgressBarDemo example=new JProgressBarDemo();  
43.     }  
44. }