Question

2. Write a Java program which will store, manipulate, and print student registration information.

As part of the solution, identify the following classes:

• Student
• Admissions.

The class Student must have the following fields – Name, Address, Id number, Courses, and Date, where:

• Name is a user defined class comprising of at minimum first name and last name.
• Address is a user defined class comprising of fields - street, city, state, and zip code.
• Date is a predefined class in the java.util package
• The field Courses is a set of no more than five (5) string values representing the courses being registered for. Course names supplied are assumed to be valid and contains no blank space, for instance COP3337 is valid but not COP 3337.
• Id number a string variable that uniquely identifies a student.

The class Student must be capable of adding courses and dropping courses

The class Admissions stores and manipulates the student information (student record). Because the list of students grows dynamically, it is best to use a dynamic data structure such as the ArrayList to store the information. This class should do the following, among other possible activities:

• Add student to the list
• Remove student from the list, which would first involve locating the record in order to remove it. In order to determine which record to remove you must supply the Id number as the search argument.

You are to provide a test class that coordinates the activities of the classes outlined above, by:

• Creating student objects and adding them to the database of the Admissions object
• Manipulating student record by:
  • Adding a course(s)
  • Dropping a course(s)
• Removing a student from the database
• Displaying list of currently registered students
• Displaying list of all students that were dropped from the course

Display the output in a scrollable pane, and must be formatted as follows:

CURRENTLY ENROLLED

Id number: 123456

Name:         Williams, John

Address:      2525 Hartsfield Road

Tallahassee, FL 33319

Date:          September 5, 2009

Courses:      COP3804, MATH2050, ENG3300

                  :

                  :

:

STUDENT WHO WERE DROPPED

Id number: 567890

Name:         Roberts, Kay-Anne

Date:          September 5, 2009

                  :

                  :

Note: Use the class GetData provided to enter the data from the keyboard.

import javax.swing.JOptionPane; class GetData { static double getDouble(String s) { return Double.parseDouble(getWord(s));              } static int getInt(String s) { return Integer.parseInt(getWord(s));       } static String getWord(String s) { return JOptionPane.showInputDialog(s); } }

The method display shown below shows how to display information in a scrollable pane. Listing 1.8 of text shows how the class GetData and the method display are implemented within a program.

Answer 1

package Session2;

//class for name
public class Name {
//fields

    private String FirstName;
    private String LastName;
//default constructor

    public Name() {
        this.FirstName = "";
        this.LastName = "";
    }
//parameterised constructor

    public Name(String FirstName, String LastName) {
        this.FirstName = FirstName;
        this.LastName = LastName;
    }
//accessor and mutators for all fields

    public String getFirstName() {
        return FirstName;
    }

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

    public String getLastName() {
        return LastName;
    }

    public void setLastName(String LastName) {
        this.LastName = LastName;
    }
//tostring to print Name

    @Override
    public String toString() {
        return "Name: " + LastName + ", " + FirstName;
    }
}

package Session2;

//class for Address
public class Address {
//fields street, city, state, and zip code

    private String street;
    private String city;
    private String state;
    private String zip_code;

//default constructor
    public Address() {
        this.street = "";
        this.city = "";
        this.state = "";
        this.zip_code = "";
    }

//parameterised constructor
    public Address(String street, String city, String state, String zip_code) {
        this.street = street;
        this.city = city;
        this.state = state;
        this.zip_code = zip_code;
    }
//accessor and mutators for all fields

    public String getStreet() {
        return street;
    }

    public void setStreet(String street) {
        this.street = street;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getState() {
        return state;
    }

    public void setState(String state) {
        this.state = state;
    }

    public String getZip_code() {
        return zip_code;
    }

    public void setZip_code(String zip_code) {
        this.zip_code = zip_code;
    }

//tostring to print Address
    @Override
    public String toString() {
        return "Address: " + street + " " + city + " " + state + ", " + zip_code;
    }
}

package Session2;

import java.util.Date;

//class student

public class Student {
//fields

    private int id;
    private Name Name;
    private Address Address;
    private String[] Courses;
    private int len;
    private Date Date;
//default constructor

    public Student() {
        this.id = 0;
        this.Name = null;
        this.Address = null;
        this.Courses = new String[5];
        this.len=0;
        this.Date = null;
    }
//parameterised constructor

    public Student(int id, Name Name, Address Address, String[] Courses, Date Date) {
        this.id = id;
        this.Name = Name;
        this.Address = Address;
        this.Courses = Courses;
        this.len=Courses.length;
        this.Date = Date;
    }

//accessor and mutators for all fields

    public int getId() {
        return id;
    }

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

    public Name getName() {
        return Name;
    }

    public void setName(Name Name) {
        this.Name = Name;
    }

    public Address getAddress() {
        return Address;
    }

    public void setAddress(Address Address) {
        this.Address = Address;
    }

    public String[] getCourses() {
        return Courses;
    }

    public void setCourses(String[] Courses) {
        this.Courses = Courses;
        this.len=Courses.length;
    }
//method to add course

    public void addCourses(String newcourse) {
        if (len < 5) {
            Courses[len] = newcourse;
            len++;
            System.out.println("Courses added successfully");
        } else {
            System.out.println("More Courses can't be added");
        }
    }
//method to drop courses

    public void dropCourses(String oldCourses) {
        int index=0;
        String[] Course = new String[5];
        for (int i = 0; i < len; i++) {
            if (!Courses[i].equals(oldCourses)) {
                Course[index] = Courses[i];
                index++;
            }
        }
        if (index == len) {
            System.out.println("No such course found");
        } else {
            System.out.println("Courses dropped successfully");
            len--;
        }
        Courses = Course;
    }

    public Date getDate() {
        return Date;
    }

    public void setDate(Date Date) {
        this.Date = Date;
    }

    @Override
    public String toString() {
        return "id:" + id + ",\n Name=" + Name.toString() + ",\n Address=" + Address.toString() + ",\n Courses=" + Courses + ",\n Date=" + Date + "\n";
    }
}

package Session2;

import java.util.ArrayList;
import java.util.Date;
import javax.swing.JOptionPane;

class GetData {

    static double getDouble(String s) {
        return Double.parseDouble(getWord(s));
    }

    static int getInt(String s) {
        return Integer.parseInt(getWord(s));
    }

    static String getWord(String s) {
        return JOptionPane.showInputDialog(s);
    }
}

public class Admission {

    public ArrayList<Student> StudentRecord = new ArrayList();

    public void addStudent() {
        Student s = new Student();
        s.setId(GetData.getInt("Enter the id: "));
        s.setName(new Name(GetData.getWord("Enter FirstName: "), GetData.getWord("Enter LastName: ")));
        s.setAddress(new Address(GetData.getWord("Enter Street: "), GetData.getWord("Enter City: "), GetData.getWord("Enter state: "), GetData.getWord("Enter Zip Code: ")));
        s.addCourses(GetData.getWord("Enter a course"));
        s.setDate(new Date(GetData.getWord("Enter Date: ")));
        StudentRecord.add(s);
        System.out.println("Students Enrolled successfully");
    }

    public void dropStudent(int id) {
        for (int i = 0; i < StudentRecord.size(); i++) {
            if (StudentRecord.get(i).getId() == id) {
                StudentRecord.remove(i);
                System.out.println("Students Dropped successfully");
                break;
            }
            if (StudentRecord.size() == i) {
                System.out.println("No such Student found");
            }
        }
    }

    public void Studentlist() {
        for (int i = 0; i < StudentRecord.size(); i++) {
            StudentRecord.get(i).toString();
        }
    }
}

package Session2;

public class test {

    public static void main(String[] args) {
        Admission a = new Admission();
        a.addStudent();
        a.addStudent();
        a.Studentlist();
        a.dropStudent(GetData.getInt("Enter id of student to drop: "));
        a.Studentlist();
    }
}

output: