Question

There are two errors in this code. Identify the errors and give the correct code that will make the program to display the following output:

Rectangle: height 2.0 width 4.0

Area of the Rectangle is 8.0

-----

public interface Shape {

public double getArea();

}

class Rectangle implements Shape {

double height;

double width;

public Rectangle(double height, double width) {

this.height=height;

this.width=width;

}

public double getArea() {

return height*width;

}

public String toString() {

return "Rectangle: height "+height+" width "+width;

}

}

class Main {

public static void main(String[] args) {

Shape r = new Rectangle(2.0,4.0);

System.out.println(r.toString());

System.out.println("Area of the rectangle is "+printArea(r));

}

public static double printArea(Shape s) {

if (s instance of Shape)

return s.getArea();

}

}

Answer 1

interface Shape {

        public double getArea();

}

class Rectangle implements Shape {

        double height;

        double width;

        public Rectangle(double height, double width) {

                this.height = height;

                this.width = width;

        }

        public double getArea() {

                return height * width;

        }

        public String toString() {

                return "Rectangle: height " + height + " width " + width;

        }

}

class Main {

        public static void main(String[] args) {

                Shape r = new Rectangle(2.0, 4.0);

                System.out.println(r.toString());

                System.out.println("Area of the rectangle is " + printArea(r));

        }

        public static double printArea(Shape s) {
                // ERROR1: instanceof is single word

                if (s instanceof Shape)
                        return s.getArea();
                //ERROR2:
                //missed return value
                return 0;

        }

}

NOTE : PLEASE COMMENT BELOW IF YOU HAVE CONCERNS.

I AM HERE TO HELP YOUIF YOU LIKE MY ANSWER PLEASE RATE AND HELP ME IT IS VERY IMP FOR ME