JAVA EE: Java : Collection Framework : HashSet (ToArray)

Tuesday 16 December 2014

Java : Collection Framework : HashSet (ToArray)

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HashSetExample.java

import java.util.HashSet;

/*
 * Example of toArray() method.
 */
public class HashSetExample
{
    public static void main( String[] args )
    {
        HashSet<String> hashSet = new HashSet<String>();

        hashSet.add("Rohan");
        hashSet.add("Phil");
        hashSet.add("Ram");
        hashSet.add("Dave");
        hashSet.add("Peter");

        System.out.println("hashSet : " + hashSet + "\n");

        /*
         * Returns an array containing all of the elements in this set. 
         * 
         * This method acts as bridge between array-based and collection-based APIs.
         */

        Object[] objArray = hashSet.toArray();

        for( Object object : objArray )
        {
            String name = (String) object;
            System.out.println(name);
        }

    }
}