Java进度条JProgressBar使用方法

package swimg;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JProgressBar;

import javax.swing.Timer;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

public class ProgressBar implements ActionListener,ChangeListener {

JFrame frame=null;

JProgressBar progressbar;

JLabel label;

Timer timer;

JButton b;

public ProgressBar(){

frame=new JFrame("安装");

frame.setBounds(100, 100, 400, 130);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container contentPanel=frame.getContentPane();

label=new JLabel("",JLabel.CENTER);

progressbar = new JProgressBar();

progressbar.setOrientation(JProgressBar.HORIZONTAL);

progressbar.setMinimum(0);

progressbar.setMaximum(100);

progressbar.setValue(0);

progressbar.setStringPainted(true);

progressbar.addChangeListener(this);

progressbar.setPreferredSize(new Dimension(300,20));

progressbar.setBorderPainted(true);

progressbar.setBackground(Color.pink);

JPanel panel=new JPanel();

b=new JButton("安装");

b.setForeground(Color.blue);

b.addActionListener(this);

panel.add(b);

timer=new Timer(100,this);

contentPanel.add(panel,BorderLayout.NORTH);

contentPanel.add(progressbar,BorderLayout.CENTER);

contentPanel.add(label,BorderLayout.SOUTH);

//frame.pack();

frame.setVisible(true);

}

public void actionPerformed(ActionEvent e) {

if(e.getSource()==b){

timer.start();

}

if(e.getSource()==timer){

int value=progressbar.getValue();

if(value<100)

progressbar.setValue(++value);

else{

timer.stop();

frame.dispose();

}

}

}

public void stateChanged(ChangeEvent e1) {

int value=progressbar.getValue();

if(e1.getSource()==progressbar){

label.setText("目前已完成进度："+Integer.toString(value)+"%");

label.setForeground(Color.blue);

}

}

public static void main(String[] args) {

ProgressBar app=new ProgressBar();

}

}