centerframe.java

java课件

import java.awt.Dimension;
import java.awt.Toolkit;
import javax.swing.JFrame;
/*
 * CenterFrame.java
 *
 * Created on 2007年10月20日, 下午10:31
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

/**
 *
 * @author admin
 */
public class CenterFrame {
  public static void main(String[] args) {
    JFrame frame = new JFrame("Center Frame");
    frame.setSize(400,300);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
    //获取屏幕的区域尺寸
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    int screenWidth = screenSize.width;
    int screenHeight = screenSize.height;
    
    //计算居中窗口的左上角坐标
    int x = (screenWidth - frame.getWidth()) / 2;
    int y = (screenHeight - frame.getHeight()) / 2;
    
    //定位并显示窗口
    frame.setLocation(x, y);
    frame.setVisible(true);
  }
}