During this assignment, the following jar libraries shall be configured for your project, if in your project Processing is somehow used:
- core.jar from Processing
- serial.jar from Processing
- RXTXcomm.jar from Processing
- creapro.jar from the Creative Programming assignment
Add these libraries (right click on the project, then "Properties") to the "Java Build Path" libraries by pushing the button "Add external JARs".
For RXTXcomm.jar, you also need to configure its "Native library location".
See below the picture for example. The actually places of these JARs may vary, depending on your installations.