IdentityHashMap isEmpty() Method in Java

The java.util.IdentityHashMap.isEmpty() method of IdentityHashMap class is used to check for the emptiness of the map. The method returns True if no key-value pair or mapping is present in the map else False.

Syntax:

Identity_Hash_Map.isEmpty()

Parameters:

The method does not take any parameters.

Return Value:

The method returns a boolean true if the map is empty or does not contain any mapping pairs else boolean false. The below programs illustrate the working of java.util.IdentityHashMap.isEmpty() method:

Program 1:

Mapping String Values to Integer Keys.

The Mappings are: {Geeks=20, Welcomes=25, You=30, 4=15}
Is the map empty? false

Program 2:

For an empty IdentityHashMap

The Mappings are: {}
Is the map empty? true

Note:

The same operation can be performed with any type of Mappings with variation and combination of different data types. All methods of Java.util.IdentityHashMap Class