Thats why one can hate java

I guess the representation of the data is platform dependent. (little and big endian)
Its basically a bad idea to store classes to a file directly.

Maybe there exists some serialization approach for java. ( My java is pretty pour, sorry )

Quote:

Maybe there exists some serialization approach for java.

There is a Serializable interface.

As hydroo said, I believe Java simply respects the endian-ness of the of the machine. You would have to check for that on both ends even (especially?) if you used C++ to write and read.

EDIT: I just looked things up, and I was wrong about it respecting the endian-ness of the machine... I see what you mean. It looks like it reads/writes in bigendian, even on a little endian machine.

This is apparently a common problem, and there are little endian output streams available online... you might want to check those out.

DataOutputStream makes it fairly straightforward, except that's only big-endian. java.nio.ByteBuffer lets you set the byte order and then write ints/floats/etc, which seems much nicer. java.io.FileOutputStream's getChannel should give you a channel which implements ByteBuffer. (But I've never tried doing this myself, so I could be wrong.)

Easy.


public clas FontChar implments Serializable {
...
}


Now you can use in the IO methods as you can with strings, primtitives etc.

Quote:

Original post by SunDog Easy. public clas FontChar implments Serializable { ... } Now you can use in the IO methods as you can with strings, primtitives etc.

Serialisable isn't a good idea if you want to interchange with other languages, not only might the format change between JRE versions, but the format is far from a simple outputting of the fields of an object to disk. Excors' method would be how I'd do it.

Quote:

Original post by Anonymous Poster If time/space efficiency isn't an issue, you can also serialize every primitive type as a string. This way is totally platform independent.

However, you now shift the problem onto the locale. "1.5" is good on an English system, but a French one would be expecting "1,5". [smile]