import java.io.*;
import java.util.*;

/* Application that reads temperatures from a file and stores them in an array of integers.  It then finds the average temperature and the highest temperature. */
public class Weather
{
     public static void main (String [] args)
     {
          CitiesWeather city = new CitiesWeather ();
          city.readTemperatures ();
          city.displayStatistics ();
     } // main method
} // class Weather

/* class that reads in temperatures, stores them in an array and displays statistics. */
class CitiesWeather
{
     final int maxSize = 20;
     private int [] highs = new int [maxSize];
     private int numberTemps = 0;
 
     // Method that reads from a file and stores the integers in an array.
     public void readTemperatures ()
     {
          try
          {
               BufferedReader infile = new BufferedReader (new InputStreamReader (new FileInputStream ("weather.txt")));
               int temperature = Integer.parseInt (infile.readLine ());
               while ((temperature > -20) && (numberTemps < maxSize))
               {
                    highs [numberTemps] = temperature;
                    System.out.print (temperature + " "); // Echo data in file on the screen.
                    numberTemps ++;
                    temperature = Integer.parseInt (infile.readLine ());
               }
               System.out.println ();
          } // try block
          catch (IOException ie) { System.out.println ("File not found.");}
          catch (NumberFormatException ex) { System.out.println ("Number format error.");}
     } // method readTemperatures
 
     // Find the average of all the integers in the array.
     private int calculateAverage ()
     {
          int sum = 0;
          for (int count = 0; count < numberTemps; count ++)
           sum = sum + highs [count];
          int average = sum / numberTemps;
          return average;
     } // method calculateAverage
 
     // Find the highest integer in the array.
     private int findHighest ()
     {
          int highest, location;
          highest = highs [0];
          for (int count = 1; count < numberTemps; count ++)
          if (highest < highs [count]) highest = highs [count];
          return highest;
     } // method findHighest
 
     // Get the average value and the highest value and display them on the screen.
     public void displayStatistics ()
     {
          int average = calculateAverage ();
          int highest = findHighest ();
          System.out.println ("The average high was " + average);
          System.out.println ("The highest temperature was " + highest);
     } // method displayAverage
} // class CitiesWeather

Contents of file, weather.txt
71
62
59
45
66
49
58
42
52
44
63
52
73
59
-20