Copying binary files

Question

Hello,
I have written a program that would allow a user to quickly copy a list of files or directories (including all files in the directories) over a socket in Java. When I am transfering text files, there are no problems, and everyhting transfers properly. However, when I try to run a Windows 32-bit binary file (.exe) after it was transfered, even though it is the exact same size as the original, Windows thinks that it's a DOS file. When Command Prompt launches, it gives me the following error:
Program too big to fit in memory.
The original file runs properly without any problems. I think that it's a case of setting the correct MIME type for the file, because I read and write (over a socket) in bytes, which should get rid of the problem of writing the incorrect character.
Any suggestions?
Thank you,
Max.

Answer 1

do you ever use InputStream.read()
Nope, I use InputStream.read(byte[]) instead.
I have actually solved the porblem. My problem was that I was trying to read a buffer that was 2MB in size at a time. :) When I changed it to 4096, the problem disappeared.
When I looked at the original and copied in a hex editor before I fixed the problem, I noticed the following interesting thigs:
1. the first 65 536 bytes were missing from file were missing.
2. at line 00 00 00 in the copied, the first correct code started copying, starting at line 03 00 00 in original.
Can anyone explain why this is happening? Why can't I copy more than 8192 bytes at a time (I noticed that many programs could copy 8192 properly)? Why were only the first 65 536 missing, even though I read 2MB (2 097 152)?
Again,
Thank you to everyone who replied and helped out! I greatly appreciate your help.
Thanks,
Max.