Java get image extension from byte array

Question

I have the below code for saving an image from a byte array.

I am able to save the image successfully using the below code.

Currently I am saving image with

Answer 1

There are many solutions. Very simple for example:

String contentType = URLConnection.guessContentTypeFromStream(new ByteArrayInputStream(imageBytes));

Or you can use third-party libraries. Like Apache Tika:

String contentType = new Tika().detect(imageBytes);