title: How can I determine if a file is an image on the JVM?
body: <p>I'd like to get the contents of a directory that contains arbitrary files (a typical "Downloads" directory) and determine programmatically if a given file is an Image of any type.</p>
  
  <p>I'm working in Clojure but anything available on the JVM is fair game.</p>
  
  <p>Thanks in advance!</p>