Test if a file is an image file

Question

I am using some file IO and want to know if there is a method to check if a file is an image?

Answer 1

In Java 7, there is the java.nio.file.Files.probeContentType() method. On Windows, this uses the file extension and the registry (it does not probe the file content). You can then check the second part of the MIME type and check whether it is in the form /image.