525: Mainline

The following is a program in which an array of four Movie instances is defined, data are wired in via an array initializer, the sum of the ratings is determined in a for loop, and the average of those ratings is reported via a print statement. The Movie class involved is the one defined in Segment 316:

public class Demonstrate { 
 public static void main (String argv[]) { 
  Movie movies[] = {new Movie(5, 6, 3), 
                    new Movie(8, 7, 7), 
                    new Movie(7, 2, 2), 
                    new Movie(7, 5, 5)}; 
  int sum = 0; 
  for (int counter = 0; counter < movies.length; ++counter) { 
    sum = sum + movies[counter].rating(); 
  } 
  System.out.print("The average rating of the " + movies.length); 
  System.out.println(" movies is " + sum / movies.length); 
 } 
} 
--- Result --- 
The average rating of the 4 movies is 16