闪屏

import java.awt.Container;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.Timer;

public class Flash extends JFrame{
 Container cont;//内容面板
 Toolkit tool;
 Dimension dim;
 Timer time;// swing Timer() 时间控制 参数us
 public Flash(){
  tool = Toolkit.getDefaultToolkit();
  dim = tool.getScreenSize();
  int w = (int) dim.getWidth();
  int h = (int) dim.getHeight();
  cont = this.getContentPane();
  cont.add(new ImagePane());//给内容面盘添加图片
  
  //一秒钟后关闭本框，然后打开登录界面，停止time命令
  time = new Timer(1000,new ActionListener(){

   public void actionPerformed(ActionEvent t) {
    dispose();//卸载本面板
    new Login();//登录界面
    time.stop();//停止time运行
   }
   
  });
  time.start();//time 开始运行
  this.setVisible(true);//面板可见
  this.setLocation(w/4, h/4);
  this.setSize(450,300);//面板大小300*300
  this.validate();//刷新面板
 }
 
}