如何让一个Java窗口显示一定时间(比如显示5秒种)?

Question

如标题

Answer 1

import javax.swing.*;
import java.awt.*;

public class FrameTest extends JFrame{

/**
* @param args
*/
public FrameTest(){
super("本窗口只显示5分钟");

setSize(400,400);
setVisible(true);

}
public static void main(String[] args) throws Exception {
// TODO 自动生成方法存根
FrameTest frame = new FrameTest();
Thread.sleep(5000);//睡5000ms (即5秒)
frame.setVisible(false);//隐藏了.

// 以下那句是响应关闭的,如果在期间不用到关窗口,不用这句也行的.
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
System.exit(0);//退出整个运行,要记得哦,不然虽看不见窗口了,但实际上并没有退出执行呢.

}

}

Answer 2

import java.awt.Frame;

public class Test {
public static void main(String[] args) throws Exception{
Frame f=new Frame();
f.setSize(300, 200);
f.setLocation(400, 200);
f.setVisible(true);
Thread.sleep(5000);
System.exit(0);
}
}

下面这个是改进版

import java.awt.Frame;
import java.awt.Graphics;

public class Test {
public static void main(String[] args) throws Exception{
iFrame f=new iFrame();
f.setSize(300, 200);
f.setLocation(400, 200);
f.setVisible(true);
for(int i=0;i<5;i++){
Thread.sleep(1000);
f.change(4-i);
}
System.exit(0);
}

}
class iFrame extends Frame{
private int count=5;
public void change(int count){
this.count=count;
repaint();
}
public void paint(Graphics g) {
g.drawString("还有"+count+"秒关闭！", 100, 100);
}

}

Answer 3

xue xi