Path Question for Linux versus Windows

I have a line of code that looks like this:
out.println("<br>ImageWWW = " + "<img src='" + serverPath2image +
         myUpload.getFiles().getFile(i).getFileName() + "'
alt='Images'>");

It returns a string that looks like the one below, which works on Linux
but not Windows
http:myIPAddress/upload/uploads/UniqueDateId/images/bird.gif

Of course if I change the forward slashes to a back slash it works on
windows
http:myIPAddress\upload\uploads\UniqueDateId\images\bird.gif

How can I get the string to work on Linux and Windows browsers?

Thanks in advance!

T.K.