package?mygame;
import?java.awt.*;
import?javax.swing.*;
public?class?ballgame?extends?Jframe{
	
	Image?ball?=?Toolkit.getDefaultToolkit（）.getImage（“images/ball.png“）;
	Image?desk?=?Toolkit.getDefaultToolkit（）.getImage（“images/desk.jpg“）;
	
	//小球的初始坐標
	double?x?=?100;
	double?y?=?100;
	
	//判斷小球向左向右的變量
	boolean?right?=?true;
	boolean?left?=?true;
	
	//畫窗口的方法
	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）;
		
		//判斷左右滑動
		if（right）?{
			x?=?x+10;
		}else?{
			x?=?x-10;
		}
		if（x>856-40-30）?{
			right?=?false;
		}
		if（x<40）?{
			right?=?true;
		}
		
		//判斷上下滑動
		if（left）?{
			y?=?y+5;
		}else?{
			y?=?y-5;
		}
		if（y>500-40-30）?{
			right?=?false;
		}
		

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-11-12?15:13??mygame\
?????文件?????????301??2018-11-06?20:52??mygame\.classpath
?????文件?????????382??2018-11-06?20:52??mygame\.project
?????目錄???????????0??2018-11-12?15:13??mygame\.settings\
?????文件?????????598??2018-11-06?20:52??mygame\.settings\org.eclipse.jdt.core.prefs
?????目錄???????????0??2018-11-12?15:13??mygame\bin\
?????目錄???????????0??2018-11-12?15:13??mygame\bin\mygame\
?????文件????????2036??2018-11-06?23:05??mygame\bin\mygame\ballgame.class
?????文件????????2055??2018-11-07?13:27??mygame\bin\mygame\ballgame2.class
?????目錄???????????0??2018-11-12?15:13??mygame\images\
?????文件????????2725??2018-11-06?20:56??mygame\images\ball.png
?????文件???????36885??2018-11-06?20:56??mygame\images\desk.jpg
?????目錄???????????0??2018-11-12?15:13??mygame\src\
?????目錄???????????0??2018-11-12?15:13??mygame\src\mygame\
?????文件????????1455??2018-11-06?21:44??mygame\src\mygame\ballgame.java
?????文件????????1817??2018-11-12?15:11??mygame\src\mygame\ballgame2.class
?????文件????????1478??2018-11-07?13:27??mygame\src\mygame\ballgame2.java