college.js / and Concept of Inheritence

 

// this is the parent class and the super() function will invoke and inherit this class

class Person {

constructor(n, dob, add, ph, dept, yoj,) {

this.name = n;

this.dateOfBirth = dob;

this.address = add;

this.phoneNumber = ph;

this.department = dept;

this.yearOfJoining = yoj;

}

updateAddress(newAddress) {

this.address = newAddress;

}

updatePhoneNumber(newPhoneNumber) {

this.phoneNumber = newPhoneNumber;

}

}

// This is the student class

// extends keyword will lend all the attributes and methods of Person class to Student class

class Student extends Person {

constructor(n, dob, add, ph, dept, programme, yoj, totalfee, feepaid) {

super(n, dob, add, ph, dept, yoj) // invoking the parent class Person

// These three are the some specific attributes only for Student class

this.programme = programme;

this.totalfee = totalfee;

this.feepaid = feepaid;

}

payFee(amount) {

this.feepaid += amount;

}

}

// This is the Professor class

// extends keyword will lend all the attributes and methods of Person class to Professor class

class Professor extends Person {

constructor(n, dob, add, ph, dept, yoj, qualification, salary) {

super(n, dob, add, ph, dept, yoj) // invoking the parent class Person

// These two attributes are only specific to Professor class

this.qualification = qualification;

this.salary = salary;

}

}

// Professor1 is an instance/ Object of Professor class only

let Professor1 = new Professor("Nobin", 2000, "Delhi", "3895", "Economics", 2024, "Phd",

3000000)

// invoking the class Professor

console.log(Professor1.address); // Delhi

Professor1.updateAddress("Roorke"); // updating Professor1 address from Delhi to Roorke

console.log(Professor1.address); // Roorke

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