java chapter 9 practice set

 package com.company;

class Cylinder{
    private int radius;
    private int height;

    public Cylinder(int radius, int height) {
        this.radius = radius;
        this.height = height;
    }

    public int getRadius() {
        return radius;
    }

    public void setRadius(int radius) {
        this.radius = radius;
    }//constructor

    public int getHeight() {
        return height;
    }

    public void setHeight(int height) {
        this.height = height;
    }
    public double surfaceArea(){
        return 2* Math.PI* radius * radius + 2*Math.PI*radius*height;
    }
    public double volume(){
        return Math.PI * radius * radius * height;
    }


}

class Rectangle {
    private int length;
    private int breadth;

    public Rectangle() {//problem 4
        this.length = 4;
        this.breadth = 5;
    }

    public Rectangle(int length, int breadth) {
        this.length = length;
        this.breadth = breadth;
    }

    public int getLength() {
        return length;
    }

    public int getBreadth() {
        return breadth;
    }


/*
    class Circle {
        private int radius;

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

        public int getRadius() {
            return radius;
        }

    }



    public double volume() {
        int radius;
        double d = 4.0 / 3.0;
        System.out.println(d);
        return d * Math.PI *radius*radius*radius;
    }
*/


    public  static class cwh_chapter9_practice_set {


        public static void main(String[] args) {

            // Problem 1----------------
            Cylinder myCylinder = new Cylinder(9, 12);
            System.out.println(myCylinder.getHeight());
            myCylinder.setHeight(12);
            System.out.println(myCylinder.getRadius());
            myCylinder.setRadius(9);


            // Problem 2---------------------
            System.out.println(myCylinder.surfaceArea());
            System.out.println(myCylinder.volume());


            // Problem 3,4
            Rectangle r = new Rectangle(12, 56);
            System.out.println(r.getLength());
            System.out.println(r.getBreadth());


        }
    }
}