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OOP (and Java) is full of jargon.

I don't know where you could ask your questions other than on the many java forums.

I don't do any printing so I have no info about that.

Look at the PrinterJob class.

Classes are a user defined type. The syntax to access a class's data is similar to what you posted:
classRef.memberVar

The tutorial has a lot of info: The Really Big Index

Your data description reminds me of a class with member variables: classreference.member

There is a RandomAccessFile class. See the API doc for its methods:
Java Platform SE 7
Find the class name in lower left, click on the link and the doc is shown in the main frame.

I don't know...