calling a function in a class's “owner” class

Question

Following pseudocode sums up my question pretty well I think...

class Owner {
    Bar b = new Bar();

    dostuff(){...}
}    

class Bar {
    Bar() {
              


        

Answer 1

There are 3 possibilities :

1) making dostuff() static and call it like

Owner.dostuff()

2) Creating an instance of Owner inside the class Bar

class Bar {
   Owner o;
   public Owner() {
     o = new Owner();
     o.dostuff();
   }
}

3) Inject an Owner instance through the constructor

class Bar {
   public Owner(Owner o) {
     o.dostuff();
   }
}