Does Hashmap autosort?

Question

This is my hashmap :

HashMap hashMapTest = new HashMap();

and I insert Date.getTime() into this

Answer 1

Following are 4 common implementation of Map interface in Java,

HashMap: No ordering & No preservation of insertion order on keys/values

LinkedHashMap: Preserves the insertion order

TreeMap: Ordered by the key

HashTable: Unlike HashMap, it is synchronized

Refer here for better understanding with examples.