Students Main

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

public class Program {

    public static void main(String[] args) {

        try {
            File inputFile = new File("students.txt");
            Scanner filescan = new Scanner(inputFile);

            File outputFile = new File("studentsresult.txt");
            PrintWriter pw = new PrintWriter(outputFile);

            ArrayList<Student> stds = new ArrayList<Student>();

            while (filescan.hasNextLine()) {
                String name = filescan.nextLine();
                int number = Integer.parseInt(filescan.nextLine());
                double grade = Double.parseDouble(filescan.nextLine());
                stds.add(new Student(name, number, grade));
            }

            int minGradeIndex = 0;
            int maxGradeIndex = 0;
            double sumGrades = 0;

            for (int i = 0; i < stds.size(); i++) {
                sumGrades += stds.get(i).getGrade();
                if (stds.get(i).getGrade() < stds.get(minGradeIndex).getGrade()) {
                    minGradeIndex = i;
                }
                if (stds.get(i).getGrade() > stds.get(maxGradeIndex).getGrade()) {
                    maxGradeIndex = i;
                }
            }

            double avrg = sumGrades / stds.size();

            System.out.println("Average grades: " + avrg);
            System.out.println("Max grade student: " + stds.get(maxGradeIndex));
            System.out.println("Min grade student: " + stds.get(minGradeIndex));

            pw.println("Average grades: " + avrg);
            pw.println("Max grade student: " + stds.get(maxGradeIndex));
            pw.println("Min grade student: " + stds.get(minGradeIndex));

            filescan.close();
            pw.close();
        } catch (FileNotFoundException e) {
            System.out.println("Sorry! File is not found!");
        }
    }

}