cannot extract filename with extension from filepath

[gauri18]

HI,
I have a problem......I am getting a session variable's value (which is a file path) and I am trying to extract the filename from the path.in vain.

Here's how it looks:
........
String audiofilepath;
String newfilename;
String filenameext;
//Get value of the path (Say C:\myfile.wav)
audiofilepath = (String) session.getAttribute("audiofilepath");

//remove the files original extension and attach ".txt" extension to it (say C:\myfile.txt)
newfilename = audiofilepath.substring( 0, audiofilepath.lastIndexOf( "." ) ) + ".txt";

NOw I want to get only the "myfile.txt part from the newfilename, i.e it should return myfile.txt only. I am trying to do this by :

filenameext=newfilename.match(/[^\/\\]+$/);
However when I compile this I keep getting errors like:
1.illegal start of expression filenameext=newfilename.match(/[^\/\\]+$/);
^
2.illegal character: \92 filenameext=newfilename.match(/[^\/\\]+$/);
^
3.illegal character: \92 filenameext=newfilename.match(/[^\/\\]+$/);
^
4.illegal character: \92 filenameext=newfilename.match(/[^\/\\]+$/);
^
5.')' expected filenameext=newfilename.match(/[^\/\\]+$/);
^

I am very new to java and regular expressions . Can someone explain how I can get around this problem...an example would be really gr8.

thanks.
G.

[ray326]

What regex package are you using? I don't know of one that will accept that "perlish" literal syntax; they all want a regex built from strings.

[gauri18]

I am using java.util.regex.* .

Is there any other way to separate filename from filepath (all I want to do is extract the path after the last occurence of "\" to the end of the path.
thanks.

[buntine]

Use

String [] splFileName = newfilename.split('/');

That should return an array of String's. eg C:\images\hello.gif will return an array containing: C:, images, and hello.gif.

So you just have to take the last index

String fileNoPath = splFileName[splFileName.length-1];

That should now give you the file name.

There are several ways to achieve this. You could grab everything after the returned value of newfilename.lastIndexOf("/");.

Regards.