Class person, student and teacher
Monday, November 13, 2023
⁃
Difficulty:
Intermediate
Objective
Develop a Java project that consists of three fundamental classes: Person, Student, and Teacher. The inheritance relationship establishes that the Student and Teacher classes inherit from the base Person class.
The Student class will include a public method called Study(), which will display the message "I am studying" on the screen.
Meanwhile, the Person class must contain two essential public methods: Greet() and SetAge(int age), the latter responsible for assigning the person's age.
Additionally, the Teacher class will have a public method called Explain(), which will print "I am explaining" on the screen.
As part of the logic, a public method will be included in the Student class called ViewAge(), which will display "My age is: x years" on the screen.
The challenge is complemented by the creation of a test class, StudentTeacherTest, equipped with a Main method that will perform the following actions:
- Create a new instance of Person and generate a greeting.
- Create a new instance of Student, assign an arbitrary age, generate a greeting, display its age on the screen, and start studying.
- Create a new instance of Teacher, assign an arbitrary age, generate a greeting, and start explaining.
Input
No input required
Output
Hello!
Hello!
My age is 21 years old
I'm studying
Hello!
I'm explaining
Solution
public class StudentTeacherTest {
public static void main(String[] args) {
Person myPerson = new Person();
myPerson.greet();
Student myStudent = new Student();
myStudent.setAge(21);
myStudent.greet();
myStudent.showAge();
myStudent.study();
Teacher myTeacher = new Teacher();
myTeacher.setAge(30);
myTeacher.greet();
myTeacher.explain();
}
}
class Person {
protected int age;
public void greet() {
System.out.println("Hello!");
}
public void setAge(int n) {
age = n;
}
}
class Student extends Person {
public void study() {
System.out.println("I'm studying");
}
public void showAge() {
System.out.println("My age is " + age + " years");
}
}
class Teacher extends Person {
public void explain() {
System.out.println("I'm explaining");
}
}
public class StudentTeacherTest {
public static void main(String[] args) {
Person myPerson = new Person();
myPerson.greet();
Student myStudent = new Student();
myStudent.setAge(21);
myStudent.greet();
myStudent.showAge();
myStudent.study();
Teacher myTeacher = new Teacher();
myTeacher.setAge(30);
myTeacher.greet();
myTeacher.explain();
}
}
class Person {
protected int age;
public void greet() {
System.out.println("Hello!");
}
public void setAge(int n) {
age = n;
}
}
class Student extends Person {
public void study() {
System.out.println("I'm studying");
}
public void showAge() {
System.out.println("My age is " + age + " years");
}
}
class Teacher extends Person {
public void explain() {
System.out.println("I'm explaining");
}
}
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