java.util.IdentityHashMap.size() Method

Description

The size() method is used to get the number of key-value mappings in this identity hash map.

Declaration

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

public int size()

Parameters

• NA

Return Value

The method call returns the number of key-value mappings in this map.

Exception

• NA

Example

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

package com.tutorialspoint;

import java.util.*;

public class IdentityHashMapDemo {
   public static void main(String args[]) {
      // create identity hash 
      IdentityHashMap ihmap = new IdentityHashMap();
                 
      // populate the ihmap
      ihmap.put(1, "java");
      ihmap.put(2, "util");
      ihmap.put(3, "package");      
     
      System.out.println("Size of the map: " + ihmap.size());
   }    
}

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

Size of the map: 3