Hi Budi ,
I have a question to you and others.
Which version is better to get started with for a newbie?
Version 6 with substantial documentation ,books etc.
Or Version 7 thats the latest but with relatively lesser documentation.
I would suggest the latest version. Moreover there arent any major changes that would make learning difficult. I am sure Oracle has provided enough documentation in its official Java tutorials and also lot of technical articles in the OTN. Moreover lot of blog posts explaining the new concepts have been writing by lot of bloggers.