Can someone explain how this works?

Question

so variables reference objects and are not objects themselves, so i always thought when you assigned the reference variable to null, you could no longer access that references variables, why does that change when you have a class variable, what exactly occurs when you write
anObject = null;

https://code.sololearn.com/c15790KJXS2i/?ref=app

Answer 1

In your provided code reference b is of Type A and when you set the reference variable b to null although the reference is no longer pointing to an object, due to static binding b can call A's static methods and variables.

In other words when you write b.x it doesn't matter to what b is referencing all that matters is of what type b is. You might as well write A.x and you'll get the same output.