java - 有没有一种方法可以按照传递的顺序从集合中恢复对象？

Question

我需要按照传递到集合中的顺序恢复 java Set 集合接口(interface)的元素。

java中怎么可能

Answer 1

怎么样LinkedHashSet ？

Hash table and linked list implementation of the Set interface, with predictable iteration order. This implementation differs from HashSet in that it maintains a doubly-linked list running through all of its entries. This linked list defines the iteration ordering, which is the order in which elements were inserted into the set (insertion-order). Note that insertion order is not affected if an element is re-inserted into the set. (An element e is reinserted into a set s if s.add(e) is invoked when s.contains(e) would return true immediately prior to the invocation.)