Question

Assume the following two classes as Person and Working: class Person { int personID, age; String fName, middleName, lastName; ... // the code here is irrelevant to the question } // end of Person class class Working { int personAge; boolean isUnderEighteen(Person p) { personAge = p.age; if personAge <18 System.out.println("The person is under age and cannot work"); else System.out.println("The person can legitimately work"); } } // end of Working class
A.)What type of a coupling is provided between Person and Working classes in this design? Why?B.) What problem will this type of coupling cause?C.) Suggest a new design to fix this problem you’ve mentioned in 2B. Please write down your new code and also explain.

Answer 1

Answer:

A)

This is an example of tight coupling since the class Working has to have an idea of how Person is implemented to complete its own implementation.

B)

Any change in the Person class would require a change in the working class too.

C)

CODE

class Person {

int personID, age;

String fName, middleName, lastName;

public int getAge() {

return age;

}

}

// end of Person class

class Working extends Person {

boolean isUnderEighteen() {

if (super.getAge() <18) {

System.out.println("The person is under age and cannot work");

return true;

}

else {

System.out.println("The person can legitimately work");

return false;

}

}

}

Explanation: