I am trying to upload java files to my WordPress blog but it does not let me upload any files with .java extension.

I get this error:

".java” has failed to upload due to an error

File type does not meet security guidelines. Try another.

How do I add .java extension so that it allows me to upload java source code?

I am using WordPress version 3.0.4.

2 Answers 2


Use filter 'upload_mimes'.


function add_java_files($mimes)
    // Add file extension 'extension' with mime type 'mime/type'
    $mimes['java'] = 'text/x-java-source';
    return $mimes;

I found this nice function that does the trick

function addUploadMimes($mimes) {
    $mimes = array_merge($mimes, array(
        'tmbundle|tmCommand|tmDragCommand|tmSnippet|tmLanguage|tmPreferences' => 'application/octet-stream'
    return $mimes;
add_filter('upload_mimes', 'addUploadMimes');

you can add more file types by adding them on "'tmbundle|tmCommand|tmDragCommand|tmSnippet|tmLanguage|tmPreferences'"

separated by a pipe (|)

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