Implementation With Java Applet

Interface

Java Applet gives the beautiful interface design and powerful functionalities;
To help demo the work, a manual button is added to see the transition steps for Sub Petri Net 1;
Auto button is added to start the light system to work automatically;
Scroll bar is to simulate the traffic flow ratio in both streets and it is valued from 0 to 100 :
When the NS/EW Traffic Ratio is located in the range smaller than 20:80 or greater than 80:20, Sub Net 3 is eligible for firing after the current running Sub Net returns the token to the Control Panel,
otherwise Sub Net 1 is eligible for firing after the current running Sub Net returns the token to the Control Panel;
To simulate the case that traffic are loose in both streets, the “All Red ” button is set; If “All Red” button is pressed, Sub Net 2 is eligible for firing after the current running Sub Net returns the token to the Control Panel;
As the Scroll Bar is located in the Regular Light Region (20:80 — 80:20) , the light duration for the each light is displayed out respectively.