java swing进度条控制,java swing 制作进度条-- 模拟卸载，附效果图

利用timer和progressbar外加两个按钮制作的小程序，点击start按钮开始卸载，点击stop停止。

代码如下：

-----------------------------------------------以下是代码区--------------------------------------------------------------------------

import java.awt.BorderLayout;

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 extends JFrame implements ChangeListener,

ActionListener {

JButton start, stop;

JProgressBar bar;

JLabel show;

JPanel pane, pane1;

Timer timer;

public ProgressBar(String title) {

super(title);

init();

pack();

}

public void init() {

setBounds(300, 100, 300, 100);

pane = new JPanel();

pane.setLayout(new BorderLayout());

getContentPane().add(pane);

start = new JButton("start");

start.addActionListener(this);

stop = new JButton("stop");

stop.addActionListener(this);

pane1 = new JPanel();

pane1.add(start);

pane1.add(stop);

bar = new JProgressBar();

bar.setMinimum(0);

bar.setMaximum(100);

bar.setValue(100);

bar.setStringPainted(true);

bar.addChangeListener(this);

bar.setPreferredSize(new Dimension(200, 30));

int leave = 100 - bar.getValue();

show = new JLabel("已完成：" + leave, JLabel.CENTER);

pane.add(pane1, BorderLayout.NORTH);

pane.add(bar, BorderLayout.CENTER);

pane.add(show, BorderLayout.SOUTH);

timer = new Timer(50, this);

}

@Override

public void stateChanged(ChangeEvent e) {

// TODO Auto-generated method stub

int value = bar.getValue();

int leave = 100 - value;

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

show.setText("已完成：" + leave + "%");

}

}

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

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

timer.start();

} else if (e.getSource() == stop) {

timer.stop();

bar.setValue(0);

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

int value = bar.getValue();

if (value > 0) {

value--;

bar.setValue(value);

}

}

}

public static void main(String[] args) {

new ProgressBar("uninstall").setVisible(true);

}

}

------------------------------------------------------以上是代码区------------------------------------------------------------------------------

运行效果如下：

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注：本代码可以直接copy运行