Java进度条的使用

import java.awt.BorderLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JProgressBar;

publicclass ProgressBarTest extends JFrame{

       private JProgressBar jpb = new JProgressBar();

       private JButton btn = new JButton(“start”);

       public ProgressBarTest() {

              setTitle(“进度条”);

              setSize(600, 500);

              setLocationRelativeTo(null);

              setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

              setVisible(true);

              this.getContentPane().setLayout(new BorderLayout());

              jpb.setString(“准备就绪。”);

              jpb.setMinimum(0);

              jpb.setMaximum(100);

              jpb.setStringPainted(true);

              this.add(jpb,BorderLayout.SOUTH);

              this.add(btn,BorderLayout.NORTH);

              btn.addActionListener(new ActionListener() {

                     publicvoid actionPerformed(ActionEvent actionevent) {

                            new progressThread(jpb).start();

                     }

              });

       }

       /**

        * @param args

        */

       publicstaticvoid main(String[] args) {

              new ProgressBarTest();

       }

}

class progressThread extends Thread {

       private JProgressBar jpb;

       public progressThread(JProgressBar jpb) {

              this.jpb = jpb;

       }

       publicvoid run() {

              int max_amount = 100;

              int currentIndex = 0;

              while (currentIndex < max_amount) {

                     currentIndex += 10;

                     System.out.println(currentIndex);

                     jpb.setValue(currentIndex);

                     jpb.setString(“已完成进度的” + currentIndex + “%”);

                     try {

                            Thread.sleep(500);

                     } catch (InterruptedException e) {

                            // TODO Auto-generated catch block

                            e.printStackTrace();

                     }

              }

       }

}

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