Answer:
Yes.
Yes.
// constructor
public Movie( String ttl, int lngth, String dir, String rtng )
{
super(ttl, lngth); // use the base class's constructor to initialize members inherited from it
director = dir; // initialize the members new to Movie
rating = rtng;
}
Look at he constructor for class Movie.
The class definition for Video has a constructor that
initializes the member data of Video objects.
The class Movie has a constructor that initializes the data of
Movie objects.
The statement super(ttl, lngth)
invokes a
constructor of the parent
to initialize some of the data.
There are two constructors in the parent.
The one that is invoked is the one that matches the argument list
in super(ttl, lngth).
Then the next two statements initialize
the members that only Movie has.
Important Note:
super()
must be the first statement
in the subclass's constructor.
This fact is often overlooked and may cause mysterious compiler error messages.
Why is the statement that
invokes the parent's constructor called super()?