//FirstFrame.java

import javax.swing.*;

public class FirstFrame
{  
	public static void main(String[] args)
	{  
		SimpleFrame frame = new SimpleFrame();
		//設置用戶關閉框架時的響應動作
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		//顯示該框架
		frame.show();  
	}
}

class SimpleFrame extends JFrame
{
	public SimpleFrame()
	{
		//設置框架大小
		setSize(WIDTH, HEIGHT);
	}
	
	public static final int WIDTH = 300;
	public static final int HEIGHT = 200;  	
}