Renaming files in linux

Question

in localhost, i can rename fiels and move them to another folder using this
line of code
File file = new File(folder);
     File file2 = new File(newfilename);
     boolean success = file.renameTo(file2);
     if (!success) {
     System.out.println("file not renamed");
where folder is c:\folder1\file.txt
and
filename is fileback.txt
that was for renaming
it works fine in windows
but when the file was deployed on linux, it doesn't work anymore.
i also tried assigning folder with /usr/local/file.txt and it also doesn't work.
why is this?
is that really how it is with linux?

Answer 1

i'm creating and compiling the bean using jcreator and there are no logs during output. only the file not renamed line
this is the code for the method
     public void RenameFile(String newfilename,String folder)
          File file = new File(folder);
                 File file2 = new File(newfilename);
                 boolean success = file.renameTo(file2);
                 if (!success) {
                   System.out.println("file not renamed");
     }and my main method:
RenameMoveFile rmf = new RenameMoveFile();
String newfilename = "filename2";
rmf.RenameFile(newfilename,"C:\\Apache Group\\Tomcat 4.1\\webapps\\qa\\upload\\FOL\\ds1\\qims.txt");i don't see anything wrong with the code