Getting java.lang.NullPointerException when calling Method.invoke

Question

I\'m following this tutorial on Java annotaitons and implemented the Test annotation as shown there. But when running the code I get the following output.

java.l         


        

Answer 1

The problem is that you are passing a null target object to method.invoke(object) method. The target object should not be null, else a nullpointerexception is expected.

The invoke method has below usages:

Method.invoke(targetObject, args1, args2, args3...); where args1, args2, args3 etc are argument to the method being invoked.