Non-Stream I/O Classes
 
StreamTokenizer allows to read through text files retrieving
user-definable tokens instead of full-line strings.
There are methods like quoteChar(), ordinaryChars() ... and more
that define the lexical syntax of tokens. Calling nextToken() method
we parse a token from the input stream, returning a type of the token.
 
RandomAccessFile can be used to both read from and write to
a single file. It provides not-stream oriented view of a file.
Random access files can be constructed from file descriptors, file
names, or file objects. This class offers methods that allow specified
mode accesses of read-only or read-write to files.
We read/write selected records from an existing file, without reading it
from beginning to end. 
The seek(long) method of the class sets the file pointer 
to the specified absolute position. 
It's a convenient mechanism to update a specified record in a file.

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