import java.util.*;

class UseMyArrayLists1
// Demonstrates changing all occurrences of an integer in a
// MyArrayList1<Integer> object to another integer destructively, 
// showing difference between aliasing and copying.
{
 public static void main(String[] args) throws Exception
 {
  Scanner input = new Scanner(System.in);
  System.out.println("Enter some numbers (all on one line):");
  String line = input.nextLine();
  String[] numbers = line.split(" ");
  MyArrayList1<Integer> a = new MyArrayList1<Integer>(numbers.length);
  for(int i=0; i<numbers.length; i++)
      a.set(i,new Integer(numbers[i]));
  System.out.println("The numbers are stored in a MyArrayList1 object");
  MyArrayList1<Integer> b=a;
  MyArrayList1<Integer> c=copy(a);
  System.out.println("\nThe MyArrayList1 object is "+a);
  System.out.println("The MyArrayList1 object viewed through its alias is "+b);
  System.out.println("The copy of the MyArrayList1 object is "+c);
  System.out.print("\nEnter two numbers: ");
  Integer p = input.nextInt(), q=input.nextInt();
  System.out.println("Change "+p+" to "+q+" in the MyArrayList1 object");
  change(a,p,q);
  System.out.println("\nThe MyArrayList1 object is now "+a);
  System.out.println("The MyArrayList1 viewed through its alias is now "+b);
  System.out.println("The copy of the MyArrayList1 object is now "+c);
 }

 public static <T> MyArrayList1<T> copy(MyArrayList1<T> a)
 {
  MyArrayList1<T> b = new MyArrayList1<T>(a.size());
  for(int i=0; i<a.size(); i++)
     b.set(i,a.get(i));
  return b;
 }

 public static <T> void change(MyArrayList1<T> a,T m,T n)
 {
  for(int i=0; i<a.size(); i++)
    if(a.get(i).equals(m))
       a.set(i,n);
 }
}