java.util.IdentityHashMap.keySet() Method

Description

The keySet() method is used to get an identity-based set view of the keys contained in this map.

Declaration

Following is the declaration for java.util.IdentityHashMap.keySet() method.

public Set<K> keySet()

Parameters

NA

Return Value

The method call returns an identity-based set view of the keys contained in this map.

Exception

NA

Example

The following example shows the usage of java.util.IdentityHashMap.keySet()

package com.tutorialspoint;

import java.util.*;

public class IdentityHashMapDemo {
   public static void main(String args[]) {

      // create identity hash map
      IdentityHashMap ihmap = new IdentityHashMap();

      // populate the map
      ihmap.put(1, "java");
      ihmap.put(2, "util");
      ihmap.put(3, "package");

      // create a set view
      Set nset = ihmap.keySet();

      System.out.println("Set view is: " + nset);
   }    
}

Let us compile and run the above program, this will produce the following result.

Set view is: [2, 3, 1]

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