java.util.HashSet.clear() Method


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Description

The clear() method is used to remove all of the elements from this set. The set will be empty after this call returns.

Declaration

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

public void clear()

Parameters

NA

Return Value

NA

Exception

NA

Example

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

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");  

      // checking elements in hash set
      System.out.println("Hash set values: "+ newset);

      // clear set values
      newset.clear();

      System.out.println("Hash set values after clear: "+ newset);      
   }    
}

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

Hash set values: [Learning, Simply, Easy]
Hash set values after clear: []

java_util_hashset.htm


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