Does Java's LinkedHashMap maintain the order o

Question

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• Is the order guaranteed for the return of keys and values from a LinkedHashMap object? 7 answers

When LinkedHashMap.keySet() is called, will the order of the Set returned be the same as the order the keys were added in?

Answer 1

Yes. The exception is that when a key is reinserted, it appears in the order in which it was first inserted to the list.

Answer 2

Yes.

See: LinkedHashMap:

This linked list defines the iteration ordering, which is normally the order in which keys were inserted into the map (insertion-order).

and from the HashMap#keySet documentation:

The set [returned] is backed by the map, so changes to the map are reflected in the set, and vice-versa.