Using Inheritance

The Video class has basic information in it, and could be used for documentaries and instructional videos. But more information is needed for movie videos. Let us make a class that is similar to Video, but now includes the name of the director and a rating.

class Video
{
  String  title;    // name of the item
  int     length;   // number of minutes
  boolean avail;    // is the video in the store?

  ...               // as above
}

class Movie extends Video
{
  String  director;     // name of the director
  String  rating;       // G, PG, R, or X

  // 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 what's new to Movie
    rating = rtng;      
  }

}