如何对 HashSet 进行排序?
对于列表，我们使用 Collections.sort(List) 方法.如果我们想对 HashSet 进行排序怎么办?
For lists, we use the Collections.sort(List) method. What if we want to sort a HashSet?
推荐答案
HashSet 不保证其元素的任何顺序.如果您需要此保证，请考虑使用 TreeSet 来保存您的元素.
A HashSet does not guarantee any order of its elements. If you need this guarantee, consider using a TreeSet to hold your elements.
但是，如果您只需要针对这一事件对元素进行排序，则只需临时创建一个 List 并对其进行排序:
However if you just need your elements sorted for this one occurrence, then just temporarily create a List and sort that:
Set<?> yourHashSet = new HashSet<>();
...
List<?> sortedList = new ArrayList<>(yourHashSet);
Collections.sort(sortedList);
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