how do i get substring?

[Gemini Moses]

String S = filename.ext
I need the "ext" part of this string.
How can I get that?
Thanks

[Jessica Sant]

Like this:

String S = "filename.ext";
//First get the position of the .
int index = S.lastIndexOf( '.' );
//Then get the string from just after the . to the end
String substring = S.substring( index + 1 );

Check out the API for java.lang.String and java.lang.StringBuffer for more methods.

[Gemini Moses]

Thanks Jessica for your quick help.
I am done with my code!!
Thanks a lot