Question

Use JAVA to Design a simple registration system that allows Student to register in a course.

Requirements

• using 2 classes: class Student & class Course.
• Implement the scenarios in class Test’s main method.
• Each student has a name and an id variable.
• Each object of class Student is initialized using values of name and id passed to constructor.
• Class Student has get methods for its instance variables.(getters and setters)
• Each Course has a name, and a variable numberOfStudent representing the number of registered students.
• A course can have a maximum number of 10 students registered in it.
• Class Course store the registered students in students which is an array of type Student. When a student register in a course, he is added to the array. Each object of class Course is initialized using the title(name).
• Class Course has the following methods:
  • method getStudents(): return the array of registered students;
  • method boolean isFull(): return true if the course is full,
  • get method for the name and numberOfStudent field;
  • method registerStudent (Student student): if the course is not full, register a student in course.

Answer 1

The code is clearly explained in the comments of the code itself.

Code--

import java.util.*;
class Student
{
   //attributes
   private String name;
   private String id;
  
   //constructor with parameters
   public Student(String name, String id)
   {
       this.name = name;
       this.id = id;
   }
  
   //getters and setters
   public String getName()
   {
       return name;
   }
   public void setName(String name)
   {
       this.name = name;
   }
   public String getId()
   {
       return id;
   }
   public void setId(String id)
   {
       this.id = id;
   }
  
}
class Course
{
   //attributes
   private String name;
   private int numberOfStudent;
   Student[] students= new Student[10];
   //each object of the class is initialized using the title name
   public Course(String name)
   {
       this.name=name;
       this.numberOfStudent=0;
   }
   public Student[] getStudents()
   {
       return students;
   }
   public boolean isFull()
   {
       if(this.numberOfStudent==10)
       {
           return true;
       }
       else
       {
           return false;
       }
   }
   //get methods
   public String getName()
   {
       return name;
   }
   public int getNumberOfStudent()
   {
       return numberOfStudent;
   }
   public void registerStudent(Student student)
   {
       if(!this.isFull())
       {
           numberOfStudent++;
           students[numberOfStudent-1]=new Student(student.getName(),student.getId());
       }          
   }
  
}

public class Tests
{
   public static void main(String[] args)
   {
       Student st=new Student("Tom","00");
       Course phy=new Course("Physics");
       phy.registerStudent(st);
       st=new Student("Sam","02");
       phy.registerStudent(st);
       st=new Student("Ram","03");
       phy.registerStudent(st);
       st=new Student("Shyam","04");
       phy.registerStudent(st);
      
       //display the students
       System.out.println("Course: "+ phy.getName());
       System.out.println("Number of students: "+ phy.getNumberOfStudent());
       Student[] physt=phy.getStudents();
       System.out.printf("%10s\t%10s\n","NAME","ID");
       for(int i=0;i<phy.getNumberOfStudent();i++)
       {
           System.out.printf("%10s\t",physt[i].getName());
           System.out.printf("%10s\t\n",physt[i].getId());
       }
      
   }
}

Output Screenshot--

Note--

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