Click here to watch in Youtube : 
https://www.youtube.com/watch?v=XbpnNxPqmVs&list=UUhwKlOVR041tngjerWxVccw

import java.util.Collections;

/*
 *  Example of addAll(Collection<? super T> c,
                                T... elements) method
 */

public class CollectionsExample
{

    public static void main(String[] args)
    {
        ArrayList<String> arrayList = new ArrayList<String>();

        arrayList.add("Ajay");
        arrayList.add("Vijay");
        arrayList.add("David");

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

        String[] namesArray = { "Raju", "Karan", "Julia"};
        
        /*
         * Adds all of the specified elements to the specified collection.
         * Elements to be added may be specified individually or as an array
         * 
         * Returns: true if the collection changed as a result of the call
         */
        boolean isAdded = Collections.addAll(arrayList,namesArray);
        
        System.out.println("isAdded : "+isAdded+"\n");

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

    }

}