Thread Safety Question?

[Joe San]

The following is also from Javaranch,

Which of the following are considered Thread Safe?

1) Local Variables

2) Class Variables

3) Context Variables

4) Request Variables?

I choose 1 and 2. Am I right?

[Christophe Verré]

No. 1 and 4. Only method local variables and request variables are thread safe. I don't like the "Class Variables" thing What class is this ? The servlet class ?

[Sagar kanchi]

I think Class variables are static varibles and class refers to Servlet class itself.

[Joe San]

Yes, class variables are static servlet variables in the question's context!

[Christophe Verré]

class variables are static servlet variables

Not thread safe then.