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!");
     }
 }