Mac OS X Copying JavaApplicationStub using Java code

Question

I have a java application that copies files from one folder to another.
This works fine on Windows, but on Mac OS X a Unix executable file like JavaApplicationStub appearently does not like to be copied using Java...
I have tested the application trying to duplicate a whole MyApplication.app package.
I realize that the file system is somewhat different on Mac than Windows, but I have a hard time accepting that java should not be able to copy a unix executable file from one folder to another without damaging the file...?
The copied file has the same size, but the file info does not say "Unix executable file" but "Document".
If I double-click it, it is opened using Terminal, but all it says is "Welcome to Darwin"
If I double-click the original file, (in the original package) the embedded java application is launched...
Can anyone give me a piece of Java code that successfully copies (duplicates) a Unix executable file?
Or a hint....?
Thanks, I would be VERY grateful :)

Answer 1

I am using something like:
byte[] buf;
BufferedInputStream bis;
BufferedOutputStream bos;
int bytesRead;
int fileSize;
fileSize = (int)sourceFile.length();
buf = new byte[512];
bis = new BufferedInputStream(new FileInputStream(sourceFile));
bos = new BufferedOutputStream(new FileOutputStream(destFile));
while ((bytesRead = bis.read(buf)) > -1) {
bos.write(buf, 0, bytesRead);
bis.close();
bos.close();