NullPointerExceptions are exceptions that arise if you try and use a reference that details to no site in memory (null) as if it had been referencing an item. Initially observation: the compilation succeeds! The condition in the program is not really a compilation error. It's really a runtime I bear http://elliotmfagn.mybjjblog.com/the-fact-about-help-me-in-java-assignment-that-no-one-is-suggesting-13262115