Upload Image with Parse4j create broken image on parse

I'm trying to upload an normal jpeg image with the ParseFile.saveInBackground. Parse responds with an link, but the image is broken.

byte[] da = getImage(quelle.substring(quelle.indexOf('[')+1, quelle.indexOf(']')));
System.out.println(String.format("byte: %d, kb: %d, mb: %d", da.length, da.length/1024, (da.length/1024)/1024));
ParseFile file = new ParseFile("pic.jpg", getImage(id));
file.setContentType("image/jpg");
file.save();
file.saveInBackground();
parseObject.put("image", file);

The getImage method generates only the byte[]:

Path path = Paths.get(listOfFiles[j].toURI());
return Files.readAllBytes(path);

After the save request on the file, parse responds with

{"name":"tfss-951560de-3fd3-43b6-ad79-dab7de18f121-pic.jpg",
 "url":"http://ift.tt/1GWAiSM"}

But the image is broken. If I make the upload with a curl script, the upload works perfect:

curl -X POST \
 -H "X-Parse-Application-Id: iKD77L3n7SVsKM8a6k0d4ry4QLfZS89zEj86F4Pk" \
 -H "X-Parse-REST-API-Key: yeyNSjDwWy8w9bo6RJ0Y5NN5tx07FQmQTiR7fHxf" \
 -H "Content-Type: image/jpeg" \
 --data-binary '@master-05561825 Kopie.jpg' \
 http://ift.tt/1aiT89L

Btw. does anyone know what the '@' symbol stands for in the --data-binary?

Do I generate the byte[] wrong?