Java Copy Map To Another Map

Now finally use the copy constructor (it is a special constructor used for creating a new object as a copy of an existing object) to clone the initial map. And point to same object in memory as in original map. If the specified key is not already associated with a value or the value is null, it associates the key with the given value.

We can use putall() method to copy map content to another hashmap in java. In java, iteration over map can be done in various ways. Public void putall(map m) example.

Using a constructor of hashmap to create a clone of the original map here, in this method you will be using a hashmap constructor.

There are two interfaces for implementing map in java: Transforming hashmap to hashmap 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 import java.util.hashmap;</p> You can create a new map that copies elements from an existing map. Pass the result to the map () constructor.