Learn everything you need to throw, try, catch, and clean up after Java exceptions in your programs.

Then there’s the NullPointerException. Null pointer exception is an “exception” (error) that is particularly common when programming in Java.

In this experience paper, we share our experience on enhancing automatic unit test generation to more effectively find Java null pointer exceptions (NPEs). NPEs are among the most common and critical ...

Thanks for reporting. The actual cause is, we try to report a violation on the default constructor of that inner class, but this default constructor is not in the source (it is implicitly created).