Use the partial class definition shown below and create the following methods to

Question

Use the partial class definition shown below and create the following methods to include in the Student class: a constructor that takes one input argument as the number of homework grades, a method that will calculate the average homework grade for the student. Also create a main method (not included in the Student class) that calculates the average homework grade for each student in a course of 25 total students. Each student in the course has 4 homework assignments. public class Student { private String firstName; // first name of student private String lastName; // last name of student private int[ ] homeworkGrades; // the homework grades for the student private double averageHomeworkGrade; // the average homework grade for the student }

Explanation / Answer

// All the requrement has been fulfilled as the description given

package org.java.demo.programs;

import java.util.Scanner;

public class Student{

    private String firstName;

    private String lastName;

    private int[ ] homeworkGrades;

    private double averageHomeworkGrade;

    public Student(int[] homeworkGrades){ // for taking integer array as input during

                                                                // each student initialization

        this.homeworkGrades = homeworkGrades;

    }

    public double calculateAverageGrades(){   // for calculating average grades

        double sum= 0.0;

        int count = 0;

        double average = 0.0;

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

            sum = sum + homeworkGrades[i];

            count++;

        }

        this.averageHomeworkGrade= (double)sum/count;

        return averageHomeworkGrade;

    }

    public void setFirstName(String firstName){

        this.firstName = firstName;

    }

    public String getFirstName(){

        return this.firstName;

    }

    public void setLastName(String lastName){

        this.lastName = lastName;

    }

    public String getLastName(){

        return this.lastName;

    }

    public static void main(String args[]){

        Student[] arr = new Student[25]; // array of 25 students

        for(int s = 0; s < arr.length; s++){

        int[] assignments = new int[4];

        System.out.println("Enter the grades in number for 4 assignments");

        Scanner sc3 = new Scanner(System.in);

        for(int j = 0; j < 4; j++){

            assignments[j] = sc3.nextInt();

        }

        /*while(sc3.hasNextInt()){

           assignments[j] = sc3.nextInt();

           j++;

        }*/

        Student obj = new Student(assignments);

        System.out.println("Enter first Name of this Student");

        Scanner sc = new Scanner(System.in);

        String fname = sc.nextLine();

        obj.setFirstName(fname);

        System.out.println("Enter Last Name of this Student");

        Scanner sc1 = new Scanner(System.in);

        String lname = sc1.nextLine();

        obj.setLastName(lname);

        double amount = obj.calculateAverageGrades();

        System.out.println("Average Grades for this student " + amount);

        arr[s] = obj;

        }

    }

}

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