From the book
Oracle Certified Associate Java SE 8 Programmer I Study Guide
Creating a Multidimensional Array
Multiple array separators are all it takes to declare arrays with multiple dimensions. You
can locate them with the type or variable name in the declaration, just as before:
int vars1; // 2D array
int vars2 ; // 2D array
int vars3; // 2D array
int vars4 , space ; // a 2D AND a 3D array <----- Is "space" a 3D array ?
Thank you for bringing this to our attention, I'll forward this on to the editorial department for review.
Tom with Wiley
The variable "vars4" is a 2D array and "space" is a 3D array.