Question

How to use HashSet in Java

Answer 1

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

public class MyClass {
    public static void main(String args[]) {
        HashSet<String> hs = new HashSet<String>();              

        hs.add("java");
        hs.add("c");
        hs.add("c++");
        hs.add("c#");
        hs.add("python");
        hs.add("php");

        Iterator<String> itr = hs.iterator();
        while(itr.hasNext()) {
            System.out.println(itr.next());
        }

    }   
}




/*
run:

c#
c++
python
java
c
php

*/

 

70+ SQL courses for beginners and professionals