Within Java, please write a class encapsulating the concept of a Student, assumi

Question

Within Java, please write a class encapsulating the concept of a Student, assuming that a student has the following attributes: last name, first name, id, array of 4 grades. Include a constructor, the accessors and mutators, and method toString. Also code the following methods: one returning the GPA using the array of grades (assuming each grade represents a course grade and all courses have the same number of credit hours) and a method to add a course grade to the array of grades (this means creating a larger array). Write a client class to test all your methods.

Explanation / Answer

1)First creating Student class and declaring its members(variables)

import java.util.Arrays;

public class Student
{
   private String lastName;
   private String firstName;
   private int id;
   private char grade[]=new char[4];
  
   //Constructor to initialize data members of the class
   public Student(String lastName, String firstName, int id, char[] grade)
   {
       super();
       this.lastName = lastName;
       this.firstName = firstName;
       this.id = id;
       this.grade = grade;
   }
   //default constructor
   public Student()
   {
   }
   //getter and setter methods
   public String getLastName() {
       return lastName;
   }

   public void setLastName(String lastName) {
       this.lastName = lastName;
   }

   public String getFirstName() {
       return firstName;
   }

   public void setFirstName(String firstName) {
       this.firstName = firstName;
   }

   public int getId() {
       return id;
   }

   public void setId(int id) {
       this.id = id;
   }

   public char[] getGrade() {
       return grade;
   }

   public void setGrade(char[] grade) {
       this.grade = grade;
   }
   @Override
   public String toString() {
       return "Student [lastName=" + lastName + ", firstName=" + firstName + ", id=" + id + ", grade="
               + Arrays.toString(grade) + "]";
   }
  
}

2)Create a class to test Student class

public class StudentTestClass
{
   public static void main(String[]args)
   {
       Student ob= new Student();
       char[] chars = {'A','B','C','D'};
       ob.setGrade(chars);
      
       ob.setLastName("Joe");
       ob.setFirstName("Root");
       ob.setId(123);
       System.out.println(ob.toString());
   }
}

Output:

Student [lastName=Joe, firstName=Root, id=123, grade=[A, B, C, D]]

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