URI scheme is not “file”

Question

I get the exception: \"URI scheme is not file\"

What I am doing is trying to get the name of a file and then save that file (from another server) onto my computer/se

Answer 1

Your assumption to create File from URL is wrong here.

You just don't need to create a File from URL to the file in the Internet, so that you get the file name.

You can simply do this with parsing the URL like that:

URL fileUri = new URL("http://local.wasp.uwa.edu.au/~pbourke/miscellaneous/domefisheye/ladybug/fish4.jpg");    
int startIndex = fileUri.toString().lastIndexOf('/');
String fileName = fileUri.toString().substring(startIndex + 1);
System.out.println(fileName);

Answer 2

The URI "scheme" is the thing that comes before the ":", for example "http" in "http://stackoverflow.com".

The error message is telling you that new File(fileUri) works only on "file:" URI's (ones referring to a pathname on the current system), not other schemes like "http".

Basically, the "file:" URI is another way of specifying a pathname to the File class. It is not a magic way of telling File to use http to fetch a file from the web.