Question

Consider the following class:

class Person

{

        String name;

        int age;

        Person(String name, int age){

               this.name = name;

               this.age = age;

        }

}

1. Write a java program with two classes “Teacher” and “Student” that inherit the above class “Person”. Each class has three components: extra variable, constructor, and a method to print the student or the teacher info. The output may look like the following (Hint: you may need to use “super” reserved keyword in your implementation):

My name is: Ahmed

My age is: 35

My salary is: 8000

My name is: Khalid

My age is: 12

My grade is: 6

2. Draw a UML diagram that shows super and subclasses with the relationship between them.

Answer 1

Program Code Screenshot :

Sample Output :

Program Code to Copy

class Person {
    String name;
    int age;
    Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
}

class Student extends Person{
    int grade;
    Student(String name, int age, int grade) {
        super(name, age);
        this.grade = grade;
    }

    void print(){
        System.out.println("My name is: "+super.name);
        System.out.println("My age is: "+super.age);
        System.out.println("My grade is: "+this.grade);
    }
}

class Teacher extends Person{
    int salary;
    Teacher(String name, int age, int salary) {
        super(name, age);
        this.salary = salary;
    }

    void print(){
        System.out.println("My name is: "+super.name);
        System.out.println("My age is: "+super.age);
        System.out.println("My salary is: "+this.salary);
    }
}

class Main{
    public static void main(String[] args) {
        Teacher t = new Teacher("Ahmed",35,8000);
        t.print();
        Student s = new Student("Khalid",12,6);
        s.print();
    }
}

UML Diagrams