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

You may try something like this:

   import javax.activation.MimetypesFileTypeMap;

   File myFile;

   String mimeType = new MimetypesFileTypeMap().getContentType( myFile ));
   // mimeType should now be something like "image/png"

   if(mimeType.substring(0,5).equalsIgnoreCase("image")){
         // its an image
   }

this should work, although it doesn't seem to be the most elegant version.