Question

2. Program containing two modules:

a. Create a class Code one programmer-written constructor

Create several instance data attributes

Create 3 methods which will each be invoked from the driver program

- one method will not receive any parameters, but will return a value to driver program

- one method will receive one parameter, and will also return a value to driver program

- a display method will receive 2 parameters from driver program

Define a constant properly; use the constant in a calculation

Generate getters and setters for each data attribute

b. Create a driver program

Instantiate objects using the programmer-written constructor

Call each of 3 methods, for every instantiated object, saving any values being returned

Call display method passing necessary values to the method that resides in the class

Answer 1

If you have any problem with the code feel free to comment.

Circle PART A

import java.awt.Point;

class Circle {
        // constant variable
        private static final double PI = 3.14;
        // instance variables
        private int x;
        private int y;
        private double radius;

        // constructor
        public Circle(int x, int y, double radius) {
                this.x = x;
                this.y = y;
                this.radius = radius;
        }

        // calculate area of the circle
        public double getArea() {
                return PI * radius * radius;
        }

        // chekcing if a point is inside the circle
        public boolean isPointInside(Point p) {
                double xPart = (p.getX() - x) * (p.getX() - x);
                double yPart = (p.getY() - y) * (p.getY() - y);
                double radiusSquare = radius * radius;
                if (xPart + yPart <= radiusSquare)
                        return true;
                return false;
        }

        // displaying circle propertise
        public void display(String color, String fillColor) {
                System.out.println("Location: (" + x + ", " + y + ")");
                System.out.println("Rdaius: " + radius + "units");
                System.out.println("Color: " + color);
                System.out.println("Fill Color: " + fillColor);
        }

        // ALL GETTERS AND SETTERS
        public int getX() {
                return x;
        }

        public void setX(int x) {
                this.x = x;
        }

        public int getY() {
                return y;
        }

        public void setY(int y) {
                this.y = y;
        }

        public double getRadius() {
                return radius;
        }

        public void setRadius(double radius) {
                this.radius = radius;
        }
}

Test PART B

import java.awt.Point;

//demo class for testing 
public class Test {
        public static void main(String[] args) {
                Point p = new Point(2, 2);
                Circle circle = new Circle(2, 3, 10);

                System.out.println("Area of the circle: " + circle.getArea() + "units");
                System.out.println("Is point(2, 2) inside the circle? " + circle.isPointInside(p));
                System.out.println("\nCircle Stats:-");
                circle.display("Black", "Orange");
        }
}

Output