... suggest to read further;
* Petri Nets are created with PetriNetExec by writing Java code and using the provided API;
* PetriNetExec provides a simple yet powerful callback mechanism allowing you to actually do something when events are fired and the network status is changing.
* PetriNetExec is embeddable into your Java application. This means that you can build your own application and add Petri Nets into it.
* PetriNetExec is open-source.