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();

}

}

}

}

 

读取大文件可以考虑使用进度条。