A good answer might be:
Yes. Java programs on all platforms use the same data type formats.
InputStream
You will need to know what data type is used
in the file---byte, short, int,
or long---but once you know that,
there will be no problems.
But if the file contains several data types and
you don't know the order they were written,
it will be difficult to read.
The subclasses of InputStream
are used to read bytes that use the format
of various data types.
Not all of these streams are concerned with input
from disk files.
For example, PipedInputStream
represents data coming in from another running program.
QUESTION 2:
If a file was written with DataOutputStream,
what input stream do you suspect will be useful?