$13.$ Often methods are written generically so that you can pass arbitrary types of objects back and forth.

Consider the following method call. It requires one cast in order to work. Where should the cast be

placed in the code?

String str$1=$"hello";

String str$2=$processObject$($str$1)$;

$...$

public Object processObject$($Object obj$1)$

$\{$

Object obj$2$;

$...$

return obj$2$;

$\}$

$14.$ Starting with Java $1\mathrm{.}5$ a programmer can specify the type of the internal array that the system will

use in$,$ say, an ArrayList. Show how to create an ArrayList that has elements of type "Customer".

Assume that you have previously created the Customer class. In particular show how to $1)$ create a

reference variable for the ArrayList, $2)$ create the ArrayList object, $3)$ add a Customer object to the

ArrayList, and $4)$ retrieve that Customer object from the ArrayList.