Question

what will happen if my subclass and the parent class use the same variable name?

the parent class is sorta like this:

public class things{
    private things[] stuff;
}

and the subclass is something like this:

import java.utils.LinkedList;
public class listOfThings extends LinkedList<things>{
    private LinkedList<things> stuff;
}

is this allowed? or will the linked list override the array?

Answer 1

You’re not extending things with this example, you are extending

LinkedList<things>

This is fundamentally different than extending things.

Therefore, as is, your code should compile.