How to add all elements of a list to LinkedList

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

public class AddAllElement {
   
   
    public static void main(String[] args) {
       
        LinkedList<String> linkedList = new LinkedList<String>();
       
        linkedList.add("Mumbai");
        linkedList.add("Delhi");
        linkedList.add("Noida");
        linkedList.add("Gao");
        linkedList.add("Patna");

        //print linkedlist
        System.out.println("Linklist is = "+linkedList);
       
        List<String> brr = new LinkedList<String>();
        brr.add("one");
        brr.add("second");
      
        //Appends all of the elements in the specified collection
        //to the end of this list, in the order that they are
        //returned by the specified collection's Iterator.
       
        linkedList.addAll(brr);
      
        System.out.println("After AddAll list brr ="+linkedList);
      
        List<String> arr = new ArrayList<String>();
        arr.add("Delhi");
        arr.add("Kurukshetra");
  
        linkedList.addAll(arr);
     
        System.out.println("After AddAll list arraylist"+linkedList);

    }
}

Output:

Linklist is = [Mumbai, Delhi, Noida, Gao, Patna]

After AddAll list brr =[Mumbai, Delhi, Noida, Gao, Patna, one, second]

After AddAll list arraylist[Mumbai, Delhi, Noida, Gao, Patna, one, second, Delhi, Kurukshetra]