The java.util.IdentityHashMap.containsValue() method is used to check whether a particular value is being mapped by a single or more than one key in the IdentityHashMap. It takes the Value as a parameter and returns True if that value is mapped by any of the keys in the map.
Syntax:
Identity_HashMap.containsValue(Object Value)
Parameters: The method takes just one parameter
Value of Object type and refers to the value whose mapping is supposed to be checked by any key inside the map.
Return Value: The method returns boolean true if the mapping of the value is detected else false.
Below programs illustrate the java.util.IdentityHashMap.containsValue() Method:
Program 1: Mapping String Values to Integer Keys.
Output:
Initial Mappings are: {10=Geeks, 30=You, 20=Geeks, 25=Welcomes, 15=4}
Is the value 'Geeks' present? true
Is the value 'World' present? false
Program 2: Mapping Integer Values to String Keys.
Output:
Initial Mappings are: {Geeks=20, Welcomes=25, You=30, 4=15}
Is the value '10' present? false
Is the value '30' present? true
Is the value '40' present? false
Note: The same operation can be performed with any type of Mappings with variation and combination of different data types.
