About Question com.enthuware.jfcja.v8.2.309 :

[laura.lang]

about "No reason for this" on NullPointerException - this explanation may be improved - if it's explained that this only applies to call on a null object reference, which is different than an array with object elements which are null.
Both int{} and Object{} have been initialized, so neither array is null.

[admin]

Good point. Enhanced the explanation.
thank you for your feedback!