public class JProgressBarTest  extends JFrame{

     public JProgressBarTest() {

         super();

         setTitle("表格");

         setBounds(100,100,350,150);

         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

         final JButton button = new JButton("           ");

         final JButton button2 = new JButton("完成");

         button2.setEnabled(false); //初始化时不可用

         button.setBounds(100,100,100,100);

         final JProgressBar progressBar = new JProgressBar();

         progressBar.setStringPainted(true);  //显示提示信息

         progressBar.setIndeterminate(false);   //确定进度的进度条

         //progressBar.setIndeterminate(true);   //不确定进度的进度条

 //        progressBar.setString("升级中...");    //确定信息时加上此条，则提示升级中，没有%比，如是不加上这个，则会提示%

         setLayout(new FlowLayout(2,10,10));

         getContentPane().add(button);  //布局处理

         getContentPane().add(button2);  //布局处理

         getContentPane().add(progressBar);  //布局处理

         new Progress(progressBar,button2).start();   //自定义类progress

     }

     /**

      * @param args

      */

     public static void main(String[] args) {

         // TODO Auto-generated method stub

         JProgressBarTest jProgressBarTest = new JProgressBarTest();

         jProgressBarTest.setVisible(true);

     }

 }

 class Progress extends Thread{//自定义类progress

     private final int []progressValue = {2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,

             62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100};

     private JProgressBar progressBar;

     private JButton button;

     public Progress(JProgressBar progressBar,JButton button)

     {

         this.progressBar = progressBar;

         this.button =button;

     }

     public void run()

     {

         for(int i=0;i<progressValue.length;i++)

         {

             try

             {

                 Thread.sleep(100);

             }catch(Exception e)

             {

                 e.printStackTrace();

             }

             progressBar.setValue(progressValue[i]);  //进度值

         }

         progressBar.setIndeterminate(false);  //采用确定的进度条

         //progressBar.setIndeterminate(true);   //不确定进度的进度条

         progressBar.setString("升级完成.");  //提示信息

         button.setEnabled(true);  //按钮可用

     }

 }