How to determine the file extension of a file from a uri

Question

Assuming I am given a URI, and I want to find the file extension of the file that is returned, what do I have to do in Java.

For example the file at http://www.daml.

Answer 1

I am doing it in this way.

You can check any file extension with more validation:

String stringUri = uri.toString();
String fileFormat = "png";

                    if (stringUri.contains(".") && fileFormat.equalsIgnoreCase(stringUri.substring(stringUri.lastIndexOf(".") + 1))) {

                        // do anything

                    } else {

                        // invalid file

                    }