/**
 *　創建一個空的框架
 */

import javax.swing.JFrame;

public class BlankFrameTest
{
	public static void main(String[] args)
	{
		BlankFrame frame = new BlankFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.show();
	} 
}

class BlankFrame extends JFrame
{
	private static final int WIDTH = 300;
	private static final int HEIGHT = 200;
	public BlankFrame()
	{
		setSize(WIDTH, HEIGHT);
	}
}