package?a;

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

@SuppressWarnings（“serial“）
public?class?BallGame?extends?Jframe{

	//圖片加載
	Image?ball=Toolkit.getDefaultToolkit（）.getImage（“images/ball.png“）;
	Image?desk=Toolkit.getDefaultToolkit（）.getImage（“images/desk.jpg“）;
	
	//小球坐標
	double?x?=?100;
	double?y?=?100;
	
	//方向
	boolean?right?=?true;
	//畫窗口
	public??void?paint（Graphics?g）{
		System.out.println（“窗口被畫了一次“）;
		g.drawImage（desk?0?0?null）;
		g.drawImage（ball?（int）x?（int）y?null）;
		
		if（right）{
			x?=?x?+?10;
		}else{
			x?=?x?-?10;
		}
		
		if（x>856-30-40）{?//桌子寬40?小球直徑30
			right=false;
		}
		if（x<40）{
			right=true;
		}
		
	}
	
	//窗口加載
	void?launchframe（）{
		setSize（856500）;
		setLocation（100100）;
		setVisible（true）;
		
		//重畫窗口?每秒25次
		while（true）{
			repaint（）;
			try?{
				Thread.sleep（40）;//40ms一次
			}?catch?（Exception?e）?{
				e.printStackTrace（）;
			}
		}
	}
	
	//輸出
	public?static?void?main（String[]?args）?{

		BallGame?game?=?new?BallGame（）;
		game.launchframe（）;
	
	}

}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-12-26?10:12??MyPro01\
?????文件?????????301??2018-12-26?10:11??MyPro01\.classpath
?????文件?????????383??2018-12-26?10:11??MyPro01\.project
?????目錄???????????0??2018-12-26?10:11??MyPro01\.settings\
?????文件?????????598??2018-12-26?10:11??MyPro01\.settings\org.eclipse.jdt.core.prefs
?????目錄???????????0??2018-12-26?10:13??MyPro01\bin\
?????目錄???????????0??2018-12-26?14:32??MyPro01\bin\a\
?????文件????????1825??2018-12-26?14:44??MyPro01\bin\a\BallGame.class
?????文件????????1955??2018-12-26?14:53??MyPro01\bin\a\BallGames.class
?????目錄???????????0??2018-12-26?10:13??MyPro01\images\
?????文件????????2725??2018-12-26?10:13??MyPro01\images\ball.png
?????文件???????36885??2018-12-26?10:13??MyPro01\images\desk.jpg
?????目錄???????????0??2018-12-26?10:13??MyPro01\src\
?????目錄???????????0??2018-12-26?14:32??MyPro01\src\a\
?????文件????????1111??2018-12-26?14:44??MyPro01\src\a\BallGame.java
?????文件????????1139??2018-12-26?14:53??MyPro01\src\a\BallGames.java