remove extension from file name

[Cathy Song]

Hi All,

I can get the name of a file using getName(), but I want to remove the extension

Should I just write a substring to extract a filename, or is there a method in the API to do so.

Name: file.txt
I want to remove the .txt to extract just "file"

This code does the job do for:

  
    File file = new File ("file.txt");
    String str1 = file.getName();
    int index = str1.indexOf (".");
    String str = str1.substring (0, index);

[ August 11, 2005: Message edited by: Cathy Song ]

[Ernest Friedman-Hill]

There are other ways to do it, but there's no "removeExtension" method. Your way is as good as any other.

[Stan James]

You might want lastIndexOf. I have some files that include versions like

BogWater1.3.1.exe

[Sathya Srinivasan]

The simplest version would be

String extension = filename.substring(filename.lastIndexOf('.') + 1);

The assumption is that regardless of how mant dots you have in the file name, the extension is always after the last dot.

[Stuart Gray]

So to extract the filename using the same approach as Sathya:

String name = filename.substring(0, filename.lastIndexOf('.'));

[Cathy Song]

Thanks a lot!

-Cathy