//FrameSizeSet.java

import java.awt.*;
import javax.swing.*;

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

class FrameSize extends JFrame
{
	public FrameSize()
	{
		//設置標題
		setTitle("框架尺寸");
		
		// 獲得屏幕的相關尺寸
		Toolkit tk = Toolkit.getDefaultToolkit();
		Dimension screenSize = tk.getScreenSize();
		int screenHeight = screenSize.height;
		int screenWidth = screenSize.width;
		
		// 設置框架的尺寸，大小不可調
		setSize(screenWidth / 3, screenHeight / 3);
		setResizable(false);
		
		// 設置圖標
		Image img = tk.getImage("icon.gif");
		setIconImage(img);
	}
}