Question

Please program in the Java language.

a) Write driver class that instantiates 5 objects of class Circle with radius is an even number from 2 to 10

b) Write/define the class Circle

Answer 1

public class Circle {
    final double pi = 3.14159;
    private double radius;

    public Circle(double radius) {
        this.radius = radius;
    }

    public double area(){
        return pi*radius*radius;
    }

    public double circumference(){
        return 2*pi*radius;
    }

    public double getRadius() {
        return radius;
    }

    public String toString() {
        return "Circle{radius=" + radius + '}';
    }
}

////////////////////////////////////////////////////////////////

public class CircleDriver {
    public static void main(String[] args) {
        Circle c1 = new Circle(2);
        Circle c2 = new Circle(4);
        Circle c3 = new Circle(6);
        Circle c4 = new Circle(8);
        Circle c5 = new Circle(10);
    }
}