如何对集合< T>进行排序？

本文介绍了如何对集合< T>进行排序？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个通用的集合，我试图弄清楚如何排序其中包含的项目。

I have a generic Collection and am trying to work out how I can sort the items contained within it. I've tried a few things but I can't get any of them working.

推荐答案

集合本身没有预定义顺序，因此您必须将它们转换为a java.util.List 。然后可以使用 java.util.Collections.sort

Collections by themselves do not have a predefined order, therefore you must convert them to a java.util.List. Then you can use one form of java.util.Collections.sort

Collection< T > collection = ...; List< T > list = new ArrayList< T >( collection ); Collections.sort( list ); // or Collections.sort( list, new Comparator< T >( ){...} ); // list now is sorted