public class MyGenericPair<T>
{
   /* Calls Mystring.equals(Object) because we don't know thing2 is a MyString.
    * This is due to type erasure.  When compiled, T is replaced by Object
    * because it is an unbounded type parameter. */
   public void diagonal(T thing1, T thing2)
   {
      System.out.println(thing1 + " and " + thing2 + " are equal: " + thing1.equals(thing2));
   }

   public static void main(String[] args)
   {
      MyGenericPair<MyString> pair = new MyGenericPair<MyString>();
      pair.diagonal(new MyString("a"), new MyString("b")); // false
      pair.diagonal(new MyString("c"), new MyString("c")); // false (!)
   }
}