What will be the output of this Java code?

What will be the output of this Java code?

class Dog {
  String name;
  void bark() {
    System.out.println(name + " says Woof!");
  }
}
public class Test {
  public static void main(String[] args) {
    Dog d = new Dog();
    d.name = "Buddy";
    d.bark();
  }
}