Remove all elements from Java HashSet : HashSet « Collections Data Structure « Java

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Java » Collections Data Structure » HashSet

Remove all elements from Java HashSet


   



import java.util.HashSet;



public class Main {

  public static void main(String[] args) {

    HashSet<Integer> hSet = new HashSet<Integer>();



    hSet.add(new Integer("1"));

    hSet.add(new Integer("2"));

    hSet.add(new Integer("3"));



    System.out.println(hSet);



    hSet.clear();



    System.out.println(hSet);



    System.out.println(hSet.isEmpty());



  }



}

/*

[1, 2, 3]

[]

true

*/

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23.	A memory-efficient hash set.

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