Please review at your convenience. Issue: https://bugs.openjdk.java.net/browse/JDK-8146041 Patch: http://cr.openjdk.java.net/~bpb/8146041/webrev.00/
Summary: Add recognition of TIFF header to guessContentTypeFromStream() and a test to verify that it works. Note that this change will not be integrated until after the one discussed in http://mail.openjdk.java.net/pipermail/core-libs-dev/2015-December/037832.html has been pushed. Thanks, Brian
