+ public static void main(String s[]) throws Exception
+ {
+ // we are just asserting that it is safe to do instanceof on an object that is null.
+ // let's test that theory.
+ instance_of tony = new instance_of();
+ Object fred = tony.cogitate(); // will produce null.
+ if (fred instanceof List<?>) {
+ throw new Exception("FAILURE! fred should not be instance of List<?> ! null is an instance of something!");
+ } else {
+ System.out.println("told us null is not an instance of List, which is correct.");
+ }
+ }