Boxing Fixed

fix.diff

7c7
<     private static volatile Double sensorValue;
---
>     private static volatile double sensorValue = Double.NaN;
15,16c15,16
<     private static void processSensorValue(Double value) {
<         if(value != null) {
---
>     private static void processSensorValue(double value) {
>         if(!Double.isNaN(value)) {
33c33
<         Thread sensorReader = new Thread(Boxing::readSensor);
---
>         Thread sensorReader = new Thread(FixedBoxing::readSensor);