The java.util.IdentityHashMap.hashCode() method in Java is used to fetch the hash code value of a particular this IdentityHashMap. A map consists of a number of buckets to store the key-value pair. Each bucket has a unique identity and when a key-value pair is inserted into a bucket, the key's hashcode is matched with the identifier of the bucket, and if its a match the pair is stored successfully. This is how the hash code works.
Syntax:
Identity_HashMap.hashCode()
Parameters: The method does not accept any parameters.
Return Value: The method returns the hashcode value of the map.
Below programs are used to illustrate the working of java.util.IdentityHashMap.hashCode() Method:
Program 1: Mapping String Values to Integer Keys.
Output:
Initial Mappings are: {10=Geeks, 30=You, 20=Geeks, 25=Welcomes, 15=4}
The hashcode value of the map: 2043437408
Program 2: Mapping Integer Values to String Keys.
Output:
Initial Mappings are: {Geeks=20, Welcomes=25, You=30, 4=15}
The hashcode value of the map: 751311572
Note: The same operation can be performed with any type of Mapping with variation and combination of different data types.
