Supermarket Checkout Simulator

preference Panel functions

1. read/save preference.
2. general extent of busy.
   • very idle 5 comes per min /period 12s
   • idle 10 comes per min /period 6s
   • normal 20 comes per min /period 3s
   • busy 40 comes per min /period 1.5s
   • very busy 80 comes per min /period 0.75s

simulation Panel functions

1. play speed control
2. logs panel
3. process visualization.
4. normal/expressway support
5. real-time detail available (mouse hover)
6. human-simulation: auto get the best channel logic
7. human-simulation: temper good/bad
8. processing bar
9. record:
   • total wait time for each customer
   • total utilization for each checkout
   • total products processed
   • average customer wait time
   • average checkout utilization
   • average products per trolley
   • the number of lost customers

statistics Panel functions

1. selectable text.
2. data visualization.
   • pie chart - waitingFor<1mins/1-5/5-10/10-15/15-20/>20/lost customer
   • total wait time for each customer
   • the utilization of all checkouts(normal+expressway) by time
   • products processed per minute per checkout
3. live update charts
4. export to pdf report.

remark

1. resolve the problem of, run in jdk11 and javafx11, without add the long long vm options in IntelliJ Idea: FXMLLoaderHelper (in unnamed module @0xcb6a90) cannot access class com.sun.javafx.util.Utils (in module javafx.graphics) because module javafx.graphics does not export com.sun.javafx.util to unnamed module @0xcb6a90 refer to the 'module-info.java' file.
2. another problem. confusing deeply. fixed 11/26, occurred by Arc update Exception in thread "JavaFX Application Thread" java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 4 at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248) at java.base/java.util.Objects.checkIndex(Objects.java:372) at java.base/java.util.ArrayList.get(ArrayList.java:458) at javafx.base/com.sun.javafx.collections.ObservableListWrapper.get(ObservableListWrapper.java:89) at javafx.base/com.sun.javafx.collections.VetoableListDecorator.get(VetoableListDecorator.java:306) at javafx.graphics/javafx.scene.Parent.updateCachedBounds(Parent.java:1701)

https://bugs.openjdk.java.net/browse/JDK-8163078 https://bugs.openjdk.java.net/browse/JDK-8198577

Reference

1. https://melbournechapter.net/explore/grocery-clipart-customer-shopping/
2. https://github.com/cping/LGame/tree/master/dev-res
3. https://openjfx.io/openjfx-docs/#IDE-Intellij
4. http://aalmiray.github.io/ikonli/cheat-sheet-fontawesome5.html#_regular
5. http://aalmiray.github.io/ikonli/#_fontawesome5
6. https://stackoverflow.com/questions/29941817/save-javafx-scrollpane-content-to-pdf-file?rq=1