Why protected method is not accessible from subclass?

Question

Consider the following code snippets:

package vehicle;

public abstract class AbstractVehicle {
    protected int speedFactor() {
        return 5;
    }
}

pack         


        

Answer 1

The protected modifier specifies that the member can only be accessed within its own package (as with package-private) and, in addition, by a subclass of its class in another package.

This is the reason why you can't directly call the method inside the main method on the vehicle object.

See: https://docs.oracle.com/javase/tutorial/java/javaOO/accesscontrol.html