package com.wjr.view; import java.awt.Toolkit; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.JFrame; public class MyFrame extends JFrame{ private double screenWidth=Toolkit.getDefaultToolkit().getScreenSize().getWidth(); private double screenHeight=Toolkit.getDefaultToolkit().getScreenSize().getHeight(); public MyFrame(String title,int width,int heigth) { super(title); setSize(width,heigth); int x=(int)(screenWidth-width)/2; int y=(int)(screenHeight-heigth)/2; setLocation(x,y); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); } }