java.util.IdentityHashMap.isEmpty() Method


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Description

The isEmpty() method is used to test if this identity hash map contains no key-value mappings.

Declaration

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

public boolean isEmpty()

Parameters

  • NA

Return Value

The method call returns 'true' if this identity hash map contains no key-value mappings.

Exception

  • NA

Example

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

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");
      
   // check if map is empty
   boolean isempty = ihmap.isEmpty();
      
   System.out.println("Is the map empty: " + isempty);
   }    
}

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

Is the map empty: false

java_util_identityhashmap.htm

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