DataInputStream uses Unicode to represent the data. Check the
documentation. I am not sure if attachments are allowed on this list,
but I try to attach the file  you need. Otherwise you can generate the
file using the following program derived from yours ;)

Regarding the EOF you could use EOFException, but I am sure there are
more elegant ways.

If you want to read data  files which have the format you mentioned in
your email I suggest to use BufferedReader + StringTokenizer.

the code  u have given i tested that, and that is creating a output
file indeed but that is not readable....is that a binary file???
i.e

outfile.writeInt(12);
> outfile.writeInt(7);
> outfile.writeInt(8);
> outfile.writeInt(8);
> outfile.writeInt(4);


this is producing an output file  but there is no 12 7 8 8 and
4 ....some non-readblae characters are there......

> the code  u have given i tested that, and that is creating a output
> file  indeed but that is not readable....is that a binary file???
Yes, you can call the file binary. The file contains the 12, 7, 8, 8, 4
but on 4 bytes, that's why you cannot read  them. Have a look at the hex
values and you will see the numbers there.