Right use of STATIC ?

Question

I have a class which reads a file containing a list of books and returns an array of book objects
how is the best way to get the list?
File bookFile = a file containing a list of books
A)
use a default constructor
BookLoader bl = new BookLoader();
Book[] myBooks = bl.getBooks(bookFile);
or
B)
declare the getBooks method static and call it directly
i.e.
Book[] myBooks = BookLoader.getBooks(bookFile);
is one way more efficient?

Answer 1

Static methods are slightly more efficient than instance methods, but that doesn't mean you should use them.
I suggest you use the first version, since it's more OO.
I'm not going into detail here, but later on you could extend your BookLoader and get benefits using the first version.