339: Mainline

With the abstract rating method installed in the abstract Attraction class, you can use it with an Attraction variable that has a value that is a Movie instance or Symphony instance; the rating is computed by the methods defined in the Movie or Symphony class:

public class Demonstrate { 
 public static void main (String argv[]) { 
  // Movie instance assigned to x: 
  Attraction x = new Movie (7, 7, 7); 
  System.out.println("The movie's rating is " + x.rating()); 
  // Symphony instance assigned to x: 
  x = new Symphony (7, 7, 7); 
  System.out.println("The symphony's rating is " + x.rating()); 
 } 
} 
--- Result --- 
The movie's rating is 21 
The symphony's rating is 21