A Java port of the ORCA algorithm by Tomaz Hočevar as described in the paper
A combinatorial approach to graphlet counting (2013)
This is a pretty straight port of the C++ code published here:
http://www.biolab.si/supp/orca/
Use Jitpack to include in any maven projects.
Have a look at the unit tests to see how the library is called. It's not super user-friendly at the moment. If you'd like to use this, drop me a note or make an issue, and I'll see if I can tidy it up a bit.
This code is licensed under the GPL3 (since the original code was GPL licensed as well). Any derivative work, including ports or software linking to the project should be licensed under the same. See the file LICENSE for details.