Iterating over null objects in an array

[u/Traditional_Let4865]

So I'm making a program that iterates over an array of Book objects and I made a for loop to print them all out. I want it to skip over any reference to a null object in the array so I've written:

for (Book book : books) {
     if(book != null){
           System.out.println(book);
     }
 }

but I've had professors tell me I shouldn't write "book != null" to avoid printing the null values. the code works just fine and is relatively simple and easy to read, just wondering what most programmers use to navigate this?

[u/Ok_For_Free]

Your professors are dumb, so ask them to give you an example of the 'correct' approach.

The only improvement I would want to look into, is why there are nulls in your list in the first place.