Get MIME Type in Java

MimeUtility.java

package blog.boydeploy.mimetype;

import java.io.File;
import java.io.FileNotFoundException;
import java.net.FileNameMap;
import java.net.URLConnection;
import java.util.Objects;

public class MimeUtility {

    public static String getMimeType(File file) throws FileNotFoundException {
        Objects.requireNonNull(file);

        if (!file.exists()) throw new FileNotFoundException("File is missing: " + file.getAbsolutePath());

        FileNameMap fmap = URLConnection.getFileNameMap();
        return fmap.getContentTypeFor(file.toURI().getPath());
    }
}