Get file name from a file location in Java

Question

I have a String which provides an absolute path to a file (inlcuding the file name). I want to get just the filename. What is the easiest way to do this.

It needs to be as general as possible as I cannot know in advance what the URL will be. I can't simply create a URL object and use getFile() - all though that would have been ideal if it was possible - as it's not necessarily an http:// prefix it could be c:/ or something similar.

Answer 1

new File(fileName).getName();

or

int idx = fileName.replaceAll("\\", "/").lastIndexOf("/");
return idx >= 0 ? fileName.subString(idx + 1) : fileName;

Answer 2

new File(absolutePath).getName();

Answer 3

Apache Commons IO provides the FilenameUtils class which gives you a pretty rich set of utility functions for easily obtaining the various components of filenames, although The java.io.File class provides the basics.