Helpful NullPointerException in Java 14

TestNPE.java

class A {
    public B b;
}

class B {
    public C[] array = new C[] { null };
}

class C {
    public String string;
}

public class TestNPE {

    public static void main(String[] args) {
       A a = new A();
       try {
           a.b.array[0].string = "test";
       } catch (Exception e) { // NPE since a.b is null
           e.printStackTrace(System.out);
       }

       a.b = new B();
       try {
          a.b.array[0].string = "test";
       } catch (Exception e) { // NPE since a.b.array[0] is null
           e.printStackTrace(System.out);
       }

       a.b.array[0] = new C();
       try {
           a.b.array[0].string.length();
       } catch (Exception e) { // NPE since a.b.array[0].string is null
           e.printStackTrace(System.out);
       }
    }
}