Hello!
I am a beginner in Java.
Can you recommend some books for me?

I would suggest you to visit url: javapapers.com - A good e-learning site for java users.

Thank you very much!
It's a good site for me to learn Java.

I would suggest this link. It has free Java video courses. https://goo.gl/bhMHTq

But I can not visit the website that you suggested.
@luv2code

For the free courses, you can visit: http://www.luv2code.com/javafree

these are perfect for Java beginners.

Hello,for the first time, i am geting this error for this kod:

final String MANUFACTURER; .

"The blank final field MANUFACTURER may not have been initialized"

Do you now why?

Thank you so much for recommendation.

I am also a beginner.

You have this many below options. You can choose by your own which you can understand.

Beginner:

Head First Java, 2nd Edition.
Thinking in Java (4th Edition)
Think Java.
Introduction to Java by Sedgewick.
Java in a Nutshell.
Core Java Volume I--Fundamentals (9th Edition) (Core Series): Cay S. Horstmann.
Java How To Program (late objects) by Paul Deitel, Harvey Deitel.

Read More:-Java for beginners

Well you could start with "java the complete reference" by Herbert Schlidt or you could take up Kathy Sierra's SCJP guide, it has got everything that you might need and the explanation is really great.

You can download it from here if you want but still I'd recommend buying a physical copy of the book.