null is a Java Keyword?? - Java Doc??

is null a Java keyword or not? Samuel robert says null is a keyword but Markus Green says null is not?
Where can I find different colors for the member variable, methods etc. in Java doc.
Garbage collection is it different for primitives & objects; need a good resource.
Threads a good resource. Mainly wait(),notify() and notifyall();
local inner class (defined within methods) can access only final variables within method scope. But can access all variables (public,private,protected,package,final and static) in enclosing class scope. Am I right?
I am appearing for exam this friday.
Thanks in advance for ur help
Also JSecure is it good to take or any other paid exam before real one. I am attending mocks from levteck. still need more stuff.

null is not a keyword, it is a reserved literal. you should visit this site http://www.anilbachi.8m.com/docs/certification/jcptutorial/jcpobj1.htm it will probably answer your questions.

Anyone Throw some more light on this concept please.
Let me start off with this.
I take this opportunity to wish all the best to every aspirants here.

Have you seen our new Certification FAQ??. You will find the answer there!!

'tcnagesh',
PROPER NAMES ARE NOW REQUIRED!!
Read this post for more details.
Javaranch appreciates your cooperation to comply with the official naming policy.
Ajith