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Update README.md #1

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7 changes: 5 additions & 2 deletions README.md
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Expand Up @@ -29,9 +29,12 @@ pulic Integer getMaxValue(List valueList){

```
//在您自己的READ.md中，答案写到下面的位置

public Integer getMaxValue(List valueList){
return (Integer) Collections.max(valueList);
}

//这样做的原因写到下面

collections类是集合的工具类，里面有大量的方法可以操作集合，Collections.max()方法可以获取集合中的最大值；
此公用函数有局限性，它的数据类型是包装类Integer，所以只针对int类型，对其他数据类型不适用。

```