Question

i have the text file to pull info off of. This is for JAVA. Must use arrays, JOptionPane, methods, and be able to pull and count from the file that is provided to me by my instructor. The file is a txt file that has over 1000 test scores on it without commas. Spaces are used. Please help.

Standardized Test Scores

          A local high school is giving a standardized test to all of its students. There are 50 questions on the test and the school would like you to gather some statistics on how the students performed. Scores can range anywhere from 0 to 50. All the scores are stored in a file (scores.txt) that you will need to download.

Input the data from the file and store the data into an array. To do this, you will have to have your program open the data file, count the number of elements in the file, close the file, initialize your array, reopen the file and load the data into the array.

          Next, display to the screen the number of students who got a perfect 50 score.

Your program should be written using methods and should be well documented internally and externally. Your output should be displayed using Message boxes.

Answer 1

/**********************************Program.java****************************/

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

import javax.swing.JOptionPane;

public class Program {

   public static void main(String[] args) {

       String fileName = JOptionPane.showInputDialog("Please enter file name");
       int numberOfScores = getNumberOfScores(fileName);

       int[] scores = getScores(fileName, numberOfScores);

       int perfectScorer = countNumberOfStudents(scores);

       JOptionPane.showMessageDialog(null, perfectScorer + " Students get the Perfect 50 score!");
   }

   public static int[] getScores(String fileName, int numberOfScores) {

       int[] scores = new int[numberOfScores];
       int i = 0;
       try {
           Scanner scan = new Scanner(new File(fileName));
           while (scan.hasNext()) {

               scores[i] = scan.nextInt();
               i++;
           }
           scan.close();
       } catch (FileNotFoundException e) {

           System.err.println(e);
       }
       return scores;
   }

   public static int getNumberOfScores(String fileName) {

       int numberOfScores = 0;
       try {
           Scanner scan = new Scanner(new File(fileName));
           while (scan.hasNext()) {
               scan.nextInt();
               numberOfScores++;
           }
           scan.close();
       } catch (FileNotFoundException e) {

           System.err.println(e);
       }

       return numberOfScores;
   }

   public static int countNumberOfStudents(int[] scores) {

       int count = 0;

       for (int i = 0; i < scores.length; i++) {

           if (scores[i] == 50) {

               count++;
           }
       }

       return count;
   }
}
/*******************scores.txt**********************/

12 50
34
50
45
46
34
24 50 34 43 23 42
45
23
42
50

/**********************output*****************/

Please let me know if you have any doubt or modify the answer, Thanks :)