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Please cite:
Dumitrescu, Ștefan Daniel. RoWordNetLib - The first API for the Romanian WordNet. In Proceedings of the Romanian Academy, Series A (The Publishing House of the Romanian Academy). vol. 16, no. 1, pp. 87--94, 2015
Article PDF at: http://www.acad.ro/sectii2002/proceedings/doc2015-1/12-Dumitrescu.pdf
It's free for research use.
Use the demo.java as a quick-start guide for using this software.