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Wednesday, 27 May 2015

How To Convert Hashset To Array

import java.util.HashSet;
import java.util.Set;

public class HashSetToArray {
   
    public static void main(String[] args) {
       
        Set<String> hs = new HashSet<String>();
        hs.add("java");
        hs.add("php");
        hs.add("html");
        hs.add("javascript");
        hs.add("mysql");

        //print hashset
        System.out.println("hashset = "+hs);
       
        String [] arr = new String[hs.size()];
       
        /*
         * Returns an array containing all of the
         * elements in hs set
         */
        hs.toArray(arr);
       
        System.out.println("Array is ");
       
        for (String str : arr) {
            System.out.println("Element is = "+str);
        }
       
    }

}

Output:

hashset = [javascript, php, html, java, mysql]

Array is

Element is = javascript

Element is = php

Element is = html

Element is = java

Element is = mysql

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