Question

in java

• Create an interface called Person. In this interface create a method called printData()

• Implement interface Person by classes Student, Teacher, Admin. You need to think the relevant data attributes for each class. Define atleast 4 attributes for each class.

• In each class override a method toString() and create a string which holds all data

• In the method printData in each class print the data using toString() method.

Design the UML and write a code to solve the above problem.

Answer 1

interface Person{
    void printData();
}

class Student implements Person{
    String name,course;
    int id,grade;
    @Override
    public void printData() {
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", course='" + course + '\'' +
                ", id=" + id +
                ", grade=" + grade +
                '}';
    }
}

class Teacher implements Person{
    String name,course;
    int sal,subjects;
    @Override
    public void printData() {
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Teacher{" +
                "name='" + name + '\'' +
                ", course='" + course + '\'' +
                ", sal=" + sal +
                ", subjects=" + subjects +
                '}';
    }
}

class Admin implements Person{
    String name,department;
    int sal,experience;
    @Override
    public void printData() {
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Admin{" +
                "name='" + name + '\'' +
                ", department='" + department + '\'' +
                ", sal=" + sal +
                ", experience=" + experience +
                '}';
    }
}

OUTPUT :

<<interface Person +printdata0: void Student Teacher Admin +name: String +course: String +id int +grade int +name: String +course: String +sal: int + subjects: int +name: String +dept: String +sal: int +experience: int + method(type): type + method(type): type + method(type): type