Question

Java Program (PLEASE PROVIDE SCREENSHOT OF THE CODE)

Create a class Person which is a super class. The class includes four private String instance variables: first name, last name, social security number, and state. Write a constructor and get methods for each instance variable. Also, add a toString method to print the details of the person. After that create a class Teacher which extends the class, Person. Add a private instance variable to store number of courses. Write a constructor and a get method for the number of courses and override toString method for Teacher. Then, create PersonTest class and create an object from the class Teacher and an object from the class Person. Display the details of Teacher and Person.

Answer 1

Person.java

public class Person {

// private instance variables

private String firstName;

private String lastName;

private String ssn;

private String state;

// parameterized constructor

public Person(String firstName, String lastName, String ssn, String state) {

this.firstName = firstName;

this.lastName = lastName;

this.ssn = ssn;

this.state = state;

}

// getter methods

public String getFirstName() {

return firstName;

}

public String getLastName() {

return lastName;

}

public String getSsn() {

return ssn;

}

public String getState() {

return state;

}

// override toString() to display person details

@Override

public String toString() {

return "Person [First Name=" + firstName + ", Last Name=" + lastName + ", SSN=" + ssn + ", State=" + state + "]";

}

}

Teacher.java

public class Teacher extends Person {

// private instance variable

private int numOfCourses;

// parameterized constructor

public Teacher(String firstName, String lastName, String ssn, String state, int numOfCourses) {

super(firstName, lastName, ssn, state); // calls super class constructor

this.numOfCourses = numOfCourses;

}

// getter method

public int getNumOfCourses() {

return numOfCourses;

}

// override toString() method to display teacher details

@Override

public String toString() {

return "Teacher [ First Name= "+getFirstName()+" Last Name= "+getLastName()+" SSN="+getSsn()+" State="+getState()+" Number Of Courses=" + numOfCourses + "]";

}

}

PersonTest.java

public class PersonTest {

public static void main(String[] args) {

// creating Teacher class object

Teacher teacher=new Teacher("Steve", "Rogers", "A12", "California", 3);

// creating Person class object

Person person=new Person("Tony", "Stark", "A13", "New York");

System.out.println(teacher);

System.out.println(person);

}

}

Output

Screenshot