Exception in thread "main" java.lang.IllegalArgumentException: input == null!
	at javax.imageio.ImageIO.read(ImageIO.java:1388)
	at cn.sxt.game.GameUtil.getImage(GameUtil.java:16)
	at cn.sxt.game.MyGameFrame.<init>(MyGameFrame.j
Exception in thread "main" java.lang.IllegalArgumentException: input == null!
	at javax.imageio.ImageIO.read(ImageIO.java:1388)
	at cn.sxt.game.GameUtil.getImage(GameUtil.java:16)
	at cn.sxt.game.MyGameFrame.<init>(MyGameFrame.java:15)
	at cn.sxt.game.MyGameFrame.main(MyGameFrame.java:58)
