1  /**

  2     This program demonstrates the measurable BankAccount and Country classes.

  3  */

  4  public class MeasurableTester

  5  {

  6     public static void main(String[] args)

  7     {

  8        Measurable[] accounts = new Measurable[3];

  9        accounts[0] = new BankAccount(0);

 10        accounts[1] = new BankAccount(10000);

 11        accounts[2] = new BankAccount(2000);

 12  

 13        double averageBalance = Data.average(accounts);

 14        System.out.println("Average balance: " + averageBalance);

 15        System.out.println("Expected: 4000");

 16  

 17        Measurable[] countries = new Measurable[3];

 18        countries[0] = new Country("Uruguay", 176220);

 19        countries[1] = new Country("Thailand", 513120);

 20        countries[2] = new Country("Belgium", 30510);

 21  

 22        double averageArea = Data.average(countries);

 23        System.out.println("Average area: " + averageArea);

 24        System.out.println("Expected: 239950");

 25     }

 26  }