Java IdentityHashMap - entrySet() Method
The java.util.IdentityHashMap.entrySet() method returns a Set view of the mappings contained in this map. Each element in the returned set is a reference-equality-based Map.Entry. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa.
Syntax
public Set<Map.Entry<K,V>> entrySet()
Here, K and V are the type of key and value respectively maintained by the container.
Parameters
No parameter is required.
Return Value
Returns a set view of the identity-mappings contained in this map.
Exception
NA
Example:
In the example below, the java.util.IdentityHashMap.entrySet() method returns a view of the mappings contained in the given map.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a identity hash map
IdentityHashMap<Integer, String> MyMap = new IdentityHashMap<Integer, String>();
//populating the map
MyMap.put(101, "John");
MyMap.put(102, "Marry");
MyMap.put(103, "Kim");
MyMap.put(104, "Jo");
MyMap.put(105, "Sam");
//printing the content of the map
System.out.println("MyMap contains: " + MyMap);
//creating a set view of mapping of the map
Set SetView = MyMap.entrySet();
//printing the set view of mapping
System.out.println("SetView contains: " + SetView);
}
}
The output of the above code will be:
MyMap contains: {105=Sam, 101=John, 102=Marry, 104=Jo, 103=Kim}
SetView contains: [105=Sam, 101=John, 102=Marry, 104=Jo, 103=Kim]
❮ Java.util - IdentityHashMap
