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

This works pretty well for me. Hope I could help

import javax.activation.MimetypesFileTypeMap; import java.io.File; class Untitled {     public static void main(String[] args) {         String filepath = "/the/file/path/image.jpg";         File f = new File(filepath);         String mimetype= new MimetypesFileTypeMap().getContentType(f);         String type = mimetype.split("/")[0];         if(type.equals("image"))             System.out.println("It's an image");         else              System.out.println("It's NOT an image");     } } 

Answer 2

if( ImageIO.read(*here your input stream*) == null)     *IS NOT IMAGE*     

And also there is an answer: How to check a uploaded file whether it is a image or other file?