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16 年
Collections.sort()与comparator 排序问题
arraylist中是一个自定义的数据结构: 我的问题是:如何先按类型再按ID,甚至再按数据1、数据2排序给这个list排序,有建议的朋友都有份。 comparator是一个接口,使用其排序时,只需要实现其方法然后调用**list.sort(new Comparator())**即可;collections.sort其实也是用的 ...
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