Question

Java program

The file enrollments.txt is a text file with each line containing a positive integer that represents the enrollment in a section of CIS 103. The highest value is 36. Write a program to read the data from the file into an array, then calculate and display the number of sections, the average class size, the minimum class size, and the maximum class size.

enrollments.txt

36
36
36
34
35
25
34
31
29
19
35
33
36
32
34
25
36
36
36
32
34
31
30

please do in netbeans.

Answer 1

Code

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Arrays;

public class classEnrollment
{
   public static void main(String args[]) throws FileNotFoundException, IOException
   {
       BufferedReader br = new BufferedReader(new FileReader("enrollments.txt"));
      
       //if number of Sections has to be Increased just go to higher value in new int[ ]
       int arr[] = new int[24];
       int index = 0;
       int sum = 0;

       String line = br.readLine();
       while(line != null)
       {
           int j = Integer.parseInt(line);
           sum += j;
           arr[index] = j;
           index++;
           line = br.readLine();
       }

       int minimumvalue = arr[0], maximumvalue = arr[0];
       // Finding Minimum value and Maximum value of the class
       for(int i = 0; i < arr.length; i++)
       {
           //To find Minimum Class Size
           if(minimumvalue > arr[i])
           {
               minimumvalue = arr[i];
           }
           //To find Maximum Class Size
           if(maximumvalue < arr[i])
           {
               maximumvalue = arr[i];
           }
       }

       // Finding the average of Section 103
       float avg = sum/arr.length;
       System.out.println("\nSections of CSE 103 : " +Arrays.toString(arr));
       System.out.println("\nTotal number of Sections    : "+arr.length);
       System.out.println("Average Class Size        : "+avg);
       System.out.println("Section   which contains minimum Class Size or Students : "+minimumvalue);
       System.out.println("Section   which contains maximum Class Size or Students : "+maximumvalu