java.util.HashSet.isEmpty() Method


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Description

The isEmpty() method is used to check if this set contains no elements.

Declaration

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

public boolean isEmpty()

Parameters

NA

Return Value

The method call returns 'true' if this set contains no elements.

Exception

NA

Example

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

Live Demo
package com.tutorialspoint;

import java.util.*;

public class HashSetDemo {
   public static void main(String args[]) {
      
      // create hash set
      HashSet <String> newset = new HashSet <String>();

      // populate hash set
      newset.add("Learning"); 
      newset.add("Easy");
      newset.add("Simply");  

      // check if the has set is empty
      boolean isempty = newset.isEmpty();

      System.out.println("Is the hash set empty: "+ isempty);
   }    
}

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

Is the hash set empty: false

java_util_hashset.htm

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