java swing 窗口不用时定时关闭 博客分类： java swing WindowEventswing定时关闭窗口不用时关闭空闲时关闭

我写了一些java swing客户端程序,我想达到一个效果:长时间不用时自动关闭.

如何实现呢?

启动主窗口时,调用如下方法,给Frame添加监听事件:

private void init33() {
		this.addWindowListener(new WindowAdapter() {

			@Override
			public void windowActivated(WindowEvent e) {
				System.out.println("window Activated");
				if (task != null) {
					task.cancel();
					task = null;
				}
				super.windowActivated(e);
			}

			@Override
			public void windowDeactivated(WindowEvent e) {
				System.out.println("window Deactivated");
				if (isLocked) {// over three times and is still locked,meanwhile use
					// try to log in
					if (task != null) {
						task.cancel();
						task = null;
					}
				} else {// first into this if clause(if (timesFail >=
						// LoginUtil.MAX_LOGIN_FAIL_TIMES ))
					task = null;
				}
				if (timer == null) {
					timer = new Timer();
				}
			
				if (task == null) {
					task = new MyTask(QRCodeApp.this);
				}
				timer.schedule(task, Constant.MILLISECONDS_WAIT_WHEN_FAIL);
				System.out.println("开始计时");
				isLocked = true;
				super.windowDeactivated(e);
			}

			@Override
			public void windowGainedFocus(WindowEvent e) {
				System.out.println("window GainedFocus");
				super.windowGainedFocus(e);
			}

			@Override
			public void windowLostFocus(WindowEvent e) {
				System.out.println("window LostFocus");
				super.windowLostFocus(e);
			}
			
		});
	}

 MyTask 源码:

package com.qr.yj.common;

import com.qr.yj.QRCodeApp;

public class MyTask extends java.util.TimerTask{
	private QRCodeApp frame;
	
	public MyTask(QRCodeApp frame) {
		super();
		this.frame=frame;
	}

	@Override
	public void run() {
		frame.setLocked(false);
		System.out.println("$$$$$");
		frame.dispose();
		System.exit(0);
	}
}

 说明:

(1)Constant.MILLISECONDS_WAIT_WHEN_FAIL 的值600000 ,int类型,单位是:毫秒,即600秒.

(2)QRCodeApp 继承了JFrame,有如下成员变量:

private Timer timer = new Timer();
	private MyTask task = null;
	private boolean isLocked = false;

 后台日志:

window Activated

window Deactivated

开始计时

window Activated

window Deactivated

开始计时

$$$$$

 

程序源代码见附件:qrcode_swing.zip

依赖的jar包:io0007-find_progess-0.0.8.4-SNAPSHOT.jar,

注意:程序采用maven 构建