Update Map Value Java

In such a case, we can update the value using the put method. Read the map by key of artist and get the list of songs so far updated in the map b if the list of songs by artist is null, redefine the list and write it back to the map. The collection views method allows a map to be viewed as a collection in the following ways:

Update value in hashmap using hashmap.put () in java we use the put () method with hashmap when we want to insert a value into the hashmap. Java map interface a map contains values on the basis of key, i.e. A map is useful if you have to search, update or delete elements on the basis of a key.

We can retrieve the inner object using the get () method.

Update a value in a map using javascript # use the set () method to update a value in a map, e.g. This interface takes the place of the dictionary class, which was a totally abstract class rather than an interface. Loop through the full list of songs in the song list one song at a time. This option checks if the map already contains a key.