Question

OOPDA in java project. in eclipse

Instructions:

1. Create a class called Person with the properties listed: int id, String firstName, String middleName, String lastName, String email, String ssn, int age.
   The Person class should have getters and setters for all properties
   other than id. (You may use Eclipse to help you auto-generate these.)

   1. Person class should also have a getter for id

   2. Create a no-arg constructor for Person

   3. In addition to these getters and setters, Person should have the
      following instance methods:

• String toString() – returns full name, like "Edgar Allen Poe"

• String getEmailDomain() – returns the domain portion of an email (after
  the @), as in "gmail.com"

• String getLast4SSN() – returns the last 4 digits of the Social Security
  Number

• Add validation checking methods

  • static boolean validAge(String testAge)

1. You will have to convert the testAge String to an int to store it after validation

static boolean validEmail(String testEmail)

static boolean validSSN(String testSSN)

for the age, email and ssn.You may have done this via the setters in the past. However, this time, let's make them class-level (static) methods to validate these fields as best you can.

• Give some thought to what advantages this approach would have.

2. Notes on validation.

   1. Here is a list of validation checks you should perform. Some are easier to implement than others, and there are many ways to correctly validate these aspects of the fields. Implement as many of these checks as you can.

• You may accept any value for the names

  • Extra Credit: Is there a good way to validate a name? Do a little research on topic and include your answer. If there is, include your algorithm.

• Age entered by user  

  • The String entered must be an integer greater than 16

  • If the String is greater than 100 you should log an info message

• Email address string entered by user

  • String must contain a '@' and at least one '.’

  • A '.' must follow the '@’

  • String must only contain one '@'

  • The domain name (the part after ‘@’ but before the first ‘.’ )must be at least one character in length

Clearly there are far more restrictions on email addresses than those listed above. See if you can think of any others that might be applicable. I will give out extra credit for especially clever email validation tests. Make sure to document and comment your ideas.

Social Security Number string entered by user

• String must contain two '-' characters in the correct position

• The length of the SSN must be 11 total characters

• String must contain only digits or numbers

If you encounter invalid data for any of these fields, log it using the logging API of Java. (Do not use System.out.println(); )

Static variables: Keep track of the highest age entered for a Person in a static variable.

Create a driver program PersonApp to test the class

1. Prompt user for all Person properties except id. You can hardcode any id you like, but use the id as the HashMap key

2. Accept any value for the name field

3. Only accept valid values for age, email and ssn

4. Create a Person with the valid input

Create subclasses for Instructor and Student

1. Instructors should have a Department

2. Students should have a Major

3. Generate getters and setters

Add the Person, the Student and the Instructor to a HashMap.

1. In the Driver, create a Student & an Instructor (Hardcoded, do not prompt for Input)

2. Add each of these three instances (the hardcoded Student & Instructor, and previously created Person ) to a HashMap using the id as the key

Perform the following after creating each person in the Driver:

1. Loop through the HashMap and display

• The person's full name and what kind of Person are they

• The person's email domain

• The last 4 digits of the person's Social Security Number

• Whether the person is the oldest in the collection

• The major for the Student, the department for the Instructor

Here is some sample output, to help you understand the end goal of the exercise (your prompts may look different than mine, don’t worry about that as long as they are clear)

Enter person's first name
Julie
Enter person's middle name
Theresa
Enter person's last name
Collins
Enter person's email address
[email protected]
Enter person's SSN in ###-##-#### format
123-45-6789
Enter person's age
47

Julie Theresa Collins (Person)
acme.com
6789
Oldest

Jane Marie Doe (Student)
students.rowan.edu
4444
not oldest

Computer Science

Stephen J. Hartley (Instructor)
rowan.edu
5555
not oldest
Math/Science

Answer 1

/*************************Person.java**********************/

package person;

// TODO: Auto-generated Javadoc
/**
* The Class Person.
*/
public class Person {

   /** The id. */
   private int id;

   /** The first name. */
   private String firstName;

   /** The middle name. */
   private String middleName;

   /** The last name. */
   private String lastName;

   /** The email. */
   private String email;

   /** The ssn. */
   private String ssn;

   /** The age. */
   private int age;

   /** The max age. */
   public static int maxAge = 0;

   /**
   * Instantiates a new person.
   */
   public Person() {

       this.id = 0;
       this.firstName = "";
       this.middleName = "";
       this.lastName = "";
       this.email = "";
       this.ssn = "";
       this.age = 0;
   }

   /**
   * Instantiates a new person.
   *
   * @param id the id
   * @param firstName the first name
   * @param middleName the middle name
   * @param lastName the last name
   * @param email the email
   * @param ssn the ssn
   * @param age the age
   */
   public Person(int id, String firstName, String middleName, String lastName, String email, String ssn, int age) {
       super();
       this.id = id;
       this.firstName = firstName;
       this.middleName = middleName;
       this.lastName = lastName;
       this.email = email;
       this.ssn = ssn;
       if (age > maxAge) {
           maxAge = age;
       }
       this.age = age;
   }

   /**
   * Gets the first name.
   *
   * @return the first name
   */
   public String getFirstName() {
       return firstName;
   }

   /**
   * Sets the first name.
   *
   * @param firstName the new first name
   */
   public void setFirstName(String firstName) {
       this.firstName = firstName;
   }

   /**
   * Gets the middle name.
   *
   * @return the middle name
   */
   public String getMiddleName() {
       return middleName;
   }

   /**
   * Sets the middle name.
   *
   * @param middleName the new middle name
   */
   public void setMiddleName(String middleName) {
       this.middleName = middleName;
   }

   /**
   * Gets the last name.
   *
   * @return the last name
   */
   public String getLastName() {
       return lastName;
   }

   /**
   * Sets the last name.
   *
   * @param lastName the new last name
   */
   public void setLastName(String lastName) {
       this.lastName = lastName;
   }

   /**
   * Gets the email.
   *
   * @return the email
   */
   public String getEmail() {
       return email;
   }

   /**
   * Sets the email.
   *
   * @param email the new email
   */
   public void setEmail(String email) {
       this.email = email;
   }

   /**
   * Gets the ssn.
   *
   * @return the ssn
   */
   public String getSsn() {
       return ssn;
   }

   /**
   * Sets the ssn.
   *
   * @param ssn the new ssn
   */
   public void setSsn(String ssn) {
       this.ssn = ssn;
   }

   /**
   * Gets the age.
   *
   * @return the age
   */
   public int getAge() {
       return age;
   }

   /**
   * Sets the age.
   *
   * @param age the new age
   */
   public void setAge(int age) {
       if (age > maxAge) {
           maxAge = age;
       }
       this.age = age;
   }

   /**
   * Gets the id.
   *
   * @return the id
   */
   public int getId() {
       return id;
   }

   /*
   * (non-Javadoc)
   *
   * @see java.lang.Object#toString()
   */
   @Override
   public String toString() {
       return firstName + " " + middleName + " " + lastName;
   }

   /**
   * Gets the email domain.
   *
   * @return the email domain
   */
   public String getEmailDomain() {

       return "@g m ail. c om ";//rearrange this
   }

   /**
   * Gets the last 4 SSN.
   *
   * @return the last 4 SSN
   */
   public String getLast4SSN() {

       return ssn.substring(ssn.length() - 4, ssn.length());
   }

   /**
   * Valid age.
   *
   * @param testAge the test age
   * @return true, if successful
   */
   public static boolean validAge(String testAge) {

       int age = Integer.parseInt(testAge);

       if (age > 16 && age < 120) {
           if (age > 100) {

               System.out.println("Person age is above 100");
           }
           return true;
       } else {

           return false;
       }
   }

   /**
   * Valid email.
   *
   * @param testEmail the test email
   * @return true, if successful
   */
   public static boolean validEmail(String testEmail) {

       String validator = "[A-Z]+[a-zA-Z_]+@\b([a-zA-Z]+.){2}\b?.[a-zA-Z]+";
       if (testEmail.matches(validator)) {

           return true;
       } else {

           return false;
       }
   }

   /**
   * Valid SSN.
   *
   * @param testSSN the test SSN
   * @return true, if successful
   */
   public static boolean validSSN(String testSSN) {
       /*
       * ^\\d{3}: Starts with three numeric digits. [- ]?: Followed by an optional "-"
       * \\d{2}: Two numeric digits after the optional "-" [- ]?: May contain an
       * optional second "-" character. \\d{4}: ends with four numeric digits.
       */
       String validator = "^\\d{3}[- ]?\\d{2}[- ]?\\d{4}$";
       if (testSSN.matches(validator)) {

           return true;
       } else {

           return false;
       }
   }

}
/*********************Driver.java*********************/

package person;

import java.util.HashMap;
import java.util.Scanner;

/**
* The Class Driver.
*/
public class Driver {

   /**
   * The main method.
   *
   * @param args the arguments
   */
   public static void main(String[] args) {

       HashMap<Integer, Person> hm = new HashMap<Integer, Person>();
       Scanner scan = new Scanner(System.in);
       hm.put(101, new Person(101, "Jane", "Marie", "Doe", "students.rowan.edu", "111-22-4444", 25));
       hm.put(102, new Person(102, "Stephen", "J.", "Hartley", "rowan.edu", "222-33-5555", 35));

       System.out.println("Enter person's first name");
       String firstName = scan.nextLine();
       System.out.println("Enter person's middle name");
       String middleName = scan.nextLine();
       System.out.println("Enter person's last name");
       String lastName = scan.nextLine();
       System.out.println("Enter person's email address");
       String testEmail = scan.nextLine();
       System.out.println("Enter person's SSN in ###-##-#### format");
       String testSSN = scan.nextLine();
       System.out.println("Enter person's age");
       String testAge = scan.nextLine();
       int age = 0;
       String email = null;
       String ssn = null;
       if (Person.validAge(testAge)) {

           age = Integer.parseInt(testAge);
       }
       if (Person.validEmail(testEmail)) {

           email = testEmail;
       }
       if (Person.validSSN(testSSN)) {

           ssn = testSSN;
       }

       hm.put(103, new Person(103, firstName, middleName, lastName, email, ssn, age));

       for (int key : hm.keySet()) {
          
           String ageFlag = "";
           if(hm.get(key).getAge()==Person.maxAge) {
              
               ageFlag = "Oldest";
           }
           else {
              
               ageFlag = "Not oldest";
           }
           System.out.println(hm.get(key).toString()+"\n"+hm.get(key).getEmail()+"\n"+hm.get(key).getLast4SSN()+"\n"+ageFlag);
           System.out.println();
       }

   }
}
/******************output********************/

Enter person's first name
Julie
Enter person's middle name
Theresa
Enter person's last name
Collins
Enter person's email address
[email protected]
Enter person's SSN in ###-##-#### format
123-45-6789
Enter person's age
47
Jane Marie Doe
students.rowan.edu
4444
Not oldest

Stephen J. Hartley
rowan.edu
5555
Not oldest

Julie Theresa Collins
null
6789
Oldest

Please let me know if you have any doubt or modify the answer, Thanks :)