java/MyFrame.java

package flowershop.view;

import java.awt.Toolkit;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;

public class MyFrame extends JFrame {
    //获得屏幕的宽度
	private double ScreenWidth = Toolkit.getDefaultToolkit().getScreenSize().getWidth();
	  //获得屏幕的高度
	private double ScreenHeigth = Toolkit.getDefaultToolkit().getScreenSize().getHeight();
	
	public MyFrame(String title,int width,int heigth) {
		super(title);
		
		//设置窗口大小
		setSize(width,heigth);
		//计算窗口居中的坐标
		int x = (int)(ScreenWidth - width) / 2;
		int y = (int)(ScreenHeigth - heigth) / 2;
		//设置窗口的位置
		setLocation(x,y);
		
		//注册窗口事件
		addWindowListener(new WindowAdapter(){

			@Override
			public void windowClosing(WindowEvent e) {
				// 退出系统
				System.exit(0);
			}
			
		});
	}
}