How to upload .jar file in Wordpress?

Question

I want to upload jar in my Wordpress website. But it seems that Wordpress does not allow to upload this type of file. I am using Wordpress 3.8.2. Any help and suggestion is greatly appreciated.

Answer 1

If you don't want to get your hands dirty and want to keep easy access to these settings, install a plugin that enables you to do this. For instance this plugin works well for me: https://wordpress.org/plugins/wp-add-mime-types/

Answer 2

Rather than editing core files (which is always a bad idea), you should consider adding a filter by hooking into the mime_types filter:

/**
 * Add JAR file type to list of allowed extensions 
 * 
 * @param array $types Default allowed mime types
 */
function so23113552_custom_mime_types( $types ) {

    $types['jar'] = 'application/java-jar';

    return $types;
}
add_filter( 'mime_types', 'so23113552_custom_mime_types' );