Question

Graded Exercise Create a class named Student. A Student has fields for an ID number, number of credit hours earned, and number of points earned. (For example, many schools compute grade point averages based on a scale of 4, so a three-credit-hour class in which a student earns an A is worth 12 points.) Include methods to assign values to all fields. A Student also has a field for grade point average. Include a method to compute the grade point average field by dividing points by credit hours earned. Write methods to display the values in each Student field. Save this class as Student.java. b. Write a class named ShowStudent2 that instantiates a Student object from the class you created and asks the user to assign values to its fields. Compute the Student grade point average, and then display all the values associated with the Student. Save the application as ShowStudent2.java.

Answer 1

import java.util.Scanner;

class Student {
   private String ID;
   private int numberOfCredits;
   private int points;
   private double gradePoint;

   public Student() {
   }

   // constructor to initialize the values
   public Student(String aID, int aNumberOfCredits, int aPoints) {
       super();
       ID = aID;
       numberOfCredits = aNumberOfCredits;
       points = aPoints;
       calculateGradePoint();
   }

   // getters and setters
   public String getID() {
       return ID;
   }

   public void setID(String aID) {
       ID = aID;
   }

   public int getNumberOfCredits() {
       return numberOfCredits;
   }

   public void setNumberOfCredits(int aNumberOfCredits) {
       numberOfCredits = aNumberOfCredits;
   }

   public int getPoints() {
       return points;
   }

   public void setPoints(int aPoints) {
       points = aPoints;
   }

   // to return object in String representation form
   @Override
   public String toString() {
       return "ID : " + ID + " NumberOfCredits : " + numberOfCredits + " Points : " + points + " Grade Point : "
               + gradePoint;
   }

   // method to find gradePoint
   public void calculateGradePoint() {
       gradePoint = points / (double) numberOfCredits;
   }
}

public class ShowStudent2 {
   public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       System.out.println("Enter Id");
       String Id = sc.next();
       System.out.println("Enter number of credits: ");
       int cs = sc.nextInt();
       System.out.println("Enter number of points: ");
       int p = sc.nextInt();
       Student s = new Student(Id, cs, p);
       System.out.println(s);
   }
}

Enter Id 123 Enter number of credits: 4 Enter number of points: 12 ID 123 NumberOfCredits : 4 Points : 12 Grade Point : 3.0

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