Question

JAVA program

For this project you are to create an array of objects of your choice using java

your Driver Class, Object Classes should all be named appropriately depending on what Classes and Objects you decide to create for this assignment.

This project must give the user the ability to view and to change the elements of the array.

Print your results (output) as a clear and informative statement. Your output should also include an explanation of what your program does for the user. Correct documentation is required

Answer 1

import java.util.*;

class Student

{

    private String name;

  private double gpa;

    private int id;

   

    Student()

    {

        this.name = "";

        this.gpa = 0.0;

        this.id = 0;

    }

   

    Student(String name)

    {

        this.name = name;

        this.gpa = 0.0;

        this.id = 0;

    }

   

    Student(String name, int id)

    {

        this.name = name;

        this.gpa = 0.0;

        this.id = id;

    }

   

    // setter methods

    public void setName(String name)

    {

        this.name = name;

    }

   

    public void setGPA(double gpa)

    {

        this.gpa = gpa;

    }

   

    public void setID(int id)

    {

        this.id = id;

    }

   

    // getter methods

    public String getName()

    {

        return this.name;

    }

   

    public double getGPA()

    {

        return this.gpa;

    }

   

    public int getID()

    {

        return this.id;

    }

   

    // method to print out the values

    public void display()

    {

        System.out.printf("Name : %s\nId : %d\nGPA : %f", this.name, this.id, this.gpa);

    }

}

public class Test

{

    public static void main(String[] args)

    {

        // create an array to store object of class Student

        Student[] arr = new Student[2];

       

        Scanner sc = new Scanner(System.in);

       

        // create a Student object

        arr[0] = new Student();

       

        System.out.println("First student ...");

        System.out.print("Enter name : ");

       

        String name1 = sc.nextLine();

       

        arr[0].setName(name1);

       

        System.out.print("Enter ID : ");

       

        int id1 = sc.nextInt();

       

        arr[0].setID(id1);

       

        System.out.print("Enter GPA : ");

       

        double gpa1 = sc.nextDouble();

       

        arr[0].setGPA(gpa1);

       

        System.out.println();

       

        arr[0].display();

       

        // create a Student object

        arr[1] = new Student();

       

        System.out.println("\n\nSecond student ...");

        System.out.print("Enter name : ");

       

        String name2 = sc.nextLine();

        name2 = sc.nextLine();

       

        arr[1].setName(name2);

       

        System.out.print("Enter ID : ");

       

        int id2 = sc.nextInt();

       

        arr[1].setID(id2);

       

        System.out.print("Enter GPA : ");

       

        double gpa2 = sc.nextDouble();

       

        arr[1].setGPA(gpa2);

       

        System.out.println();

       

        arr[0].display();

    }

}

Sample Output