进度条Demo

 package threadAndRunnable;

 import java.awt.BorderLayout;

 import javax.swing.JFrame;

 import javax.swing.JLabel;

 import javax.swing.JProgressBar;

 public class jindutiao extends JFrame {

     // JProgressBar的使用

     private static JProgressBar progress;

     public jindutiao() {

         setTitle("进度条的使用");

         setBounds(100, 100, 300, 78);

         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

         progress = new JProgressBar();

         // 显示进度文本

         progress.setStringPainted(true);

         getContentPane().add(progress, BorderLayout.CENTER);

         final JLabel jl = new JLabel("产品正在升级...");

         getContentPane().add(jl, BorderLayout.NORTH);

         setVisible(true);

     }

     public static void main(String[] args) {

         new jindutiao();

         // 设置进度条为不确定样式

         progress.setIndeterminate(true);

         for (int i = 0; i < 100; i++) {

             try {

                 Thread.sleep(1000);

             } catch (InterruptedException e) {

                 // TODO Auto-generated catch block

                 e.printStackTrace();

             }

             progress.setValue(i);

         }

         progress.setIndeterminate(false);

         progress.setString("升级完成!");

     }

 }