Homework Answers

Declare the Person superclass as abstract. Add this abstract method to the class:

public abstract void eat(String food);

Both the Student and Employee class inherit from abstract superclass Person, and provides an implementation for eat() which displays that the student or employee is eating a certain food.

(Note what happens if you don’t  implement eat().)

Create an interface called StudentInterface. This interface has the following abstract method:

public void study(String subject);

The Student class implements this interface, and provides an implementation for study() which displays that the student is studying a certain subject.

(Note what happens if you don’t  implement study().)

Create an interface called EmployeeInterface. This interface has the following abstract method:

public void workingOn(String task);

The Employee class implements this interface, and provides an implementation for workingOn() which displays that the employee is working on a certain task.

(Note what happens if you don’t  implement workingOn().)

Write a program that will be able to classify fruits based on their (1) shape, (2) color and (3) texture. We have the following assumptions:

shape can assume any of the two values, namely: 0 to represent a round shape, 1 to represent an oblong shape

color can assume any of the three values, namely: 0 to represent a green color, 1 to represent a yellow color, 2 to represent a red color, and 3 to represent an orange color

texture can assume any of the two values, namely: 0 to represent smooth texture and 1 to represent a rough texture

2. The program should be able to determine the following fruits with the following characteristics:

apple: round shape, red color, smooth texture

banana: oblong shape, yellow color or green color, smooth texture

orange: round shape, orange color, smooth texture

jackfruit: oblong shape, green color, rough texture