Java – access modifiers and methods for superclass references [copy]

See English answers > understanding Java's protected modifier 6

package pet;

public class Dog {
    protected void bark(){};
    void jump(){};  
    public void lick(){};
}


package other;
import pet.*;

public class Husky extends Dog {
    public static void main(String[] args){ 
        Husky h = new Husky();
        h.bark();     //COMPILES (Husky is a subclass of Dog - Protected method)
        h.jump();     //DOES NOT COMPILE (Different packages - package-private access method)

        Dog d = new Dog();
        d.bark();   //DOES NOT COMPILE WHY?
        d.jump();   //DOES NOT COMPILE (Different packages - package-private access method)
        d.lick();   //COMPILES (Method is public)
    }
}

Solution

Although access modifiers play an important role in inheritance, this issue should not be confused with inheritance As @vikss rightly said, super class doesn't know the following inheritance tree, so I don't know if huskey can access its protected members

Dog d = new Dog();
    d.bark();