Java list output question.

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;


class Main {
  public static void main(String[] args) {

//    1. Convert the array to List
//  2. Using the add() method in the list,
// Add a new value to the desired location
// 3. The list has been converted back to an array.

// Create Array
  String[] abc = {};
  String[] abc2 = {};

//    1. Convert the array to List
  List<String> list = new ArrayList<>(Arrays.asList(abc));

//  2. Use the add() method in the list to add a new value to the desired location
  list.add(0, "1230000");
  list.add(1, "ajshfk");
  list.add(2, "skhkgkg");
  list.add(3, "skhkgkg1");
  list.add(4, "skhkgkg2");
  list.add(5, "skhkgkg3");
  list.add(6, "skhkgkg5");

  list.add(0, "12300001");
  list.add(1, "ajshfk1");
  list.add(2, "skhkgkg1");
  list.add(3, "skhkgkg11");
  list.add(4, "skhkgkg21");
  list.add(5, "skhkgkg31");
  list.add(6, "skhkgkg51");

// 3. The list has been converted back to an array.
  abc = list.toArray(abc);
  abc2 = list.toArray(abc2);

// Put an array in the list
List<String[]> listLst = new ArrayList<String[]>();
  Collections.addAll(listLst, abc);
  Collections.addAll(listLst, abc2);
 //  //  System.out.println(list1.**toString()**); 

// To print out a list 
if(list2 != null){
  for(int i = 0; i < list2.size(); i++){
      System.out.print(list2.get(i));  // System.out.print(list2.get(i).**toString()**); 
  }
}

  }
}