simple instantiation from Mughal book

[Jarrod Legion]

Hi All,
The code below contains two classes, and an inerface. In class Planet, shouldn't the Star object orbiting be instantiated before it can use the method describe()? Without instantiating the Star class it compiles, but gives a NullpointerException, as it should, during execution. Can someone please tell me if I am right?
Mughal keeps a nice Errata page, but this isn't on it, so I am curious as why it isn't.

 interface HeavenlyBody {
String describe();
}
class Star implements HeavenlyBody {
String starName = "Moon";
public String describe() {
return "star " + starName;
}
}

class Planet {
String name = "Earth";
Star orbiting;
public String describe() {
return "planet " + name + " orbiting " + orbiting.describe();
}
}
 

TIA,
-Jarrod

[Yosi Hendarsjah]

You're right.