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Util 为抽奖工具类。。 https://github.com/hetianjun/LotteryUtil/blob/master/src/tjun/util/Util.java
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TestMethod 为李白买酒趣题的编程解答(为初级for循环) https://github.com/hetianjun/LotteryUtil/blob/master/src/tjun/util/TestMethod.java
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TestFor for 循环打印菱形 https://github.com/hetianjun/LotteryUtil/blob/master/src/tjun/util/TestFor.java