Esser's Petri Net Java Applet

Robert Esser's research activities include the development of an object-oriented time Petri net tool called CodeSign.

Inserting Petri Net components:

* Insertion of Place and Transition (Select Circle or Square button and click in editor pane).
* The connection of objects. (Select Arc button, click on first object and then on second object).
* The dragging of objects (Select Pointer button and mouse down drag)

Inserting/deleting tokens on places:

* Select the places for which initial tokens are required and press the token button. Every press of the token button will insert one token to every selected place.
* Select the places for which tokens are to be deleted and press the delete token button. Every press of the token button will delete one token from every selected place.

Deleting Petri Net components:

* Place and Transition (With the Pointer button down select the elements to delete and press the Delete key.
* Arcs. (Select Arc button click on first object and then on second object. If an arc already exists it will be deleted).