Question

How to define initialize and print HashSet in Java

Answer 1

package javaapplication1;

import java.util.HashSet;
import java.util.Iterator;

public class JavaApplication1 {

    public static void main(String[] args) {

        HashSet hashSet = new HashSet();

        hashSet.add(new Long("984772342"));
        hashSet.add(new Long("894736632"));
        hashSet.add(new Long("27346628349"));
        hashSet.add(new Long("984738774234"));
        hashSet.add(new Long("893489323233"));

        Iterator itr = hashSet.iterator();
 
        while (itr.hasNext()) 
            System.out.println(itr.next());
  }
}
  

/*
run:

984772342
27346628349
894736632
893489323233
984738774234

*/

 

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