Although it may look dated, not much has been added to the core language itself ( the libraries have had a lot of a lot of additions though )
Those I can remember are right now are enum and generics, the rest was already there when the document was first written.
Use 4 spaces always.
Don't use K&R or Allman: While it is perfectly acceptable for C, C++ and C# it's not always the case for Java (unless the project has explicitly decided to use it ). Using K&R or Allman in Java is visually unpleasant as it would be not to use it in C.
Use braces always, including single line statements.
Generally speaking try not to mix styles between programming languages. It's like the accent pronunciation in a natural language, you may be understood, you can read and write in it, and have a workable level in the language, but a deficient pronunciation will only annoy the native speakers.
