Assigning null objects to primitives
public class FalseSafetyWithAutoBoxing {
private static class Car {
public Car(Double price) {
double value = price;
}
}
public static void main(String[] args) throws Exception {
Double price = null;
Car car = new Car(price);
}
}
When you run this, you get:
$ javac FalseSafetyWithAutoBoxing.java && java FalseSafetyWithAutoBoxing
Exception in thread "main" java.lang.NullPointerException
at FalseSafetyWithAutoBoxing$Car.<init>(FalseSafetyWithAutoBoxing.java:12)
at FalseSafetyWithAutoBoxing.main(FalseSafetyWithAutoBoxing.java:18)