Are uninitialized variables set to null by default in Java?

Question

I thought that an uninitialized variables are set to null by default example shown below:

Public class foo{
Object bar;

    public void check(){
       while(bar != null){
          // Do something

        }
      }
    }

Inside the method I am getting an error about checking an uninitialized object. But by default Java would set this to null? Thanks

if you declare your object and don't instantiate than it will by default set to null. — Aiyaz Parmar, Nov 01 '14 at 12:33
@The3211 No. Not it will not. That generalisation is incorrect. — Boris the Spider, Nov 01 '14 at 12:36
@BoristheSpider hey but if we try to access that element than it will give you nullPointerException right? — Aiyaz Parmar, Nov 01 '14 at 12:38
@The3211 it depends. It might not compile, depending on _where_ you "declare your object". Read [this](http://stackoverflow.com/questions/2448843/variable-might-not-have-been-initialized-error) for example. — Boris the Spider, Nov 01 '14 at 12:40

score 0 · Answer 1 · answered Nov 01 '14 at 12:31

0

Object bar should have been initialised to null. You might get a warning about using an uninitialised variable.

answered Nov 01 '14 at 12:31

Gavin

1 Answers1