Not possible to run the project: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

[souravs17031999]

Hi,

I am able to run the code on both Java server (CICFlowmeter) and Python flask server but I am getting below exception multiple times and also no output is being shown on UI/shell (nothing is printed for prediction or results or alerts):

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at cic.cs.unb.ca.flow.ui.FlowMonitorPane.insertFlow(FlowMonitorPane.java:341)
        at cic.cs.unb.ca.flow.ui.FlowMonitorPane.lambda$startTrafficFlow$3(FlowMonitorPane.java:289)
        at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
        at javax.swing.SwingWorker$SwingWorkerPropertyChangeSupport.firePropertyChange(SwingWorker.java:854)
        at javax.swing.SwingWorker$SwingWorkerPropertyChangeSupport$1.run(SwingWorker.java:860)
        at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(SwingWorker.java:832)
        at sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112)
        at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(SwingWorker.java:842)
        at javax.swing.Timer.fireActionPerformed(Timer.java:313)
        at javax.swing.Timer$DoPostEvent.run(Timer.java:245)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
        at java.awt.EventQueue.access$500(EventQueue.java:97)
        at java.awt.EventQueue$3.run(EventQueue.java:709)
        at java.awt.EventQueue$3.run(EventQueue.java:703)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

[0neday]

same