/*
*
* Append one array list onto the end of another
* e.g. if the first array list contains  17 63 41 29 and the second contains 23 99 then
* after the append, the first array list should contain 17 63 41 29 23 99
* Difficulty: Easy
*/

import java.util.ArrayList;

public class AppendArrayLists
{
   public static void main(String[] args)
   {
      ArrayList a = new ArrayList();
      ArrayList b = new ArrayList();
      int i;

      for (i = 0; i < 5; i++)
      {
         /* Initialize array list a to some values */
         a.add(i + 3);
       
      }
      System.out.print("a: ");
      for (i = 0; i < a.size(); i++)
      {
         System.out.print(a.get(i) + " ");
      }
      System.out.println();
     
     
      for (i = 0; i < 3; i++)
      {
         /* Initialize array list b to some values */
         b.add(i + 2);
      }
      System.out.print("b: ");
      for (i = 0; i < b.size(); i++)
      {
         System.out.print(b.get(i) + " ");
      }
      System.out.println();
     

      // Append b to the end of a
      append(a, b);

      System. out.println("Result of append of a and b is: ");

      for (i = 0; i < a.size(); i++)
      {
         System.out.print(a.get(i) + " ");
      }
      System.out.println();
      System.out.println("Expected:3 4 5 6 7 2 3 4");
     
      a.clear();
      for (i = 0; i < 4; i++)
      {
         /* Initialize array list a to some values */
         a.add(i + 7);
       
      }
      System.out.print("a: ");
      for (i = 0; i < a.size(); i++)
      {
         System.out.print(a.get(i) + " ");
      }
      System.out.println();
     
      b.clear();
      System.out.print("b: ");
      for (i = 0; i < b.size(); i++)
      {
         System.out.print(b.get(i) + " ");
      }
      System.out.println();
     

      // Append b to the end of a
      append(a, b);

      System. out.println("Result of append of a and b is: ");

      for (i = 0; i < a.size(); i++)
      {
         System.out.print(a.get(i) + " ");
      }
      System.out.println();
      System.out.println("Expected:7 8 9 10");
   }

   /**
Append the given ArrayList b to the end of the given ArrayList a
@param integer ArrayList a
 @param integer ArrayList b
*/
   public static void append(ArrayList a, ArrayList b)
   {
   //-----------Start below here. To do: approximate lines of code = 3
   // append the integer elements in ArrayList b to the end of ArrayList a
   // Hint: use a for loop that goes through each element of ArrayList b
   // Hint: google "java ArrayList" to see all the methods you can use. Use the add() method
// Hint: the size() method tells you how many elements are stored in the array list  
   
   
   
   
   
   //-----------------End here. Reminder: no changes outside the todo regions.
   }
}

Include screenshots too for formatting.