打字母游戏，只是一个简单的实现，有点像金山的，有四个等级-Playing the letter game, just a simple implementation, a bit like Kingsoft, there are four levels

记得金山打字游戏么，这是模拟金山打字的简单实现，可供java初学者参考。-Remember, jinshan typing games, this is to simulate the kingsoft typing simple implementation, can be used for reference in the Java beginners.