CODEWITHSUNDEEP
javamacosmime
Thor
Thor

Reputation: 10038

unable to determine the MIME type of a file

I'm new to Java and is trying to learn how to determine the MIME type of a file. I'm using Mac OS. Below is the code I came up with. However, when I run the code, the IDE output error:

'/Users/justin/Desktop/Codes Netbean/JavaRandom/xanadu.txt' has an unknown filetype.

Why is this happening? The file does exist. Am I doing something wrong?

public class DeterminingMIMEType {

    public static void main(String[] args) {

        Path filename = Paths.get("/Users/justin/Desktop/Codes Netbean/JavaRandom/xanadu.txt");

        try {
            String type = Files.probeContentType(filename);
            if (type == null) {
                System.err.format("'%s' has an" + " unknown filetype.%n", filename);
            } else if (!type.equals("text/plain")) {
                System.err.format("'%s' is not" + " a plain text file.%n", filename);
            }
        } catch (IOException x) {
            System.err.println(x);
        }
    }
}

Upvotes: 2

Views: 2546

Answers (1)

blzbrg
blzbrg

Reputation: 148

The documentation for Files reveals that a FileTypeDetector is loaded by ServiceLoader. A wee bit of googling leads to: http://blog.byjean.eu/java/2013/08/22/making-jdk7-nio-filetypedetection-work-on-mac-osx.html which says that this is a problem with the default FileTypeDetector provided by the Oracle Java7 jvm for Mac OS. The link also has a way of providing your own FileTypeDetector, though upgrading to Java 8 (maybe?) also will fix the problem.

Upvotes: 2

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