纸牌21点游戏，有简易的GUI，也可以通过Console window显示，需要加载自己编写的有关GUI的PPS包，实现会比java自带的简单些，已上传。-BlackJack game, have a simple GUI，either can display in console window, I have written about the GUI PPS need to load the package easier than java comes.

实现一个小游戏，游戏名为21点,出牌者连续出牌点数相加不能大于21，最接近21的人胜出-achieve a small game，which called 21 points，continuous play points added is not greater than 21, the person which is closest to 21 is winner