book class
 

public class book {

        private double basePrice = 0;

        private double vat = 0;

        private double discount = 0;

        private double sellPrice;



        public book() {

                setBasePrice(0);

                setVat(0);

                setDiscount(0);

        }



        public book(double basePrice, double discount, double vat) {

                setBasePrice(basePrice);

                setVat(discount);

                setDiscount(vat);

        }



        public double getBasePrice() {

                return basePrice;

        }



        public void setBasePrice(double basePrice) {

                if (basePrice >= 0)

                        this.basePrice = basePrice;

                setSellPrice();

        }



        public double getVat() {

                return vat;

        }



        public void setVat(double vat) {

                if (vat >= 0)

                        this.vat = vat;

                setSellPrice();

        }



        public double getDiscount() {

                return discount;

        }



        public void setDiscount(double discount) {

                if (discount >= 0)

                        this.discount = discount;

                setSellPrice();

        }



        public double getSellPrice() {

                return sellPrice;

        }



        private void setSellPrice() {

                sellPrice = basePrice * ((100 + (vat - discount)) / 100);

        }



}

Re: book class
 

It looks OK. What is your problem?

Re: book class
 

package com.bookPortal.model;



public class Book {

        private double basePrice = 0;

        private int vat = 0;

        private int discount = 0;

        private double sellPrice;



        public Book() {

                setBasePrice(0);

                setVat(0);

                setDiscount(0);

        }



        public Book(double basePrice, int discount, int vat) {

                setBasePrice(basePrice);

                setVat(discount);

                setDiscount(vat);

        }



        public double getBasePrice() {

                return basePrice;

        }



        public void setBasePrice(double basePrice) {

                if (basePrice >= 0)

                        this.basePrice = basePrice;

                setSellPrice();

        }



        public int getVat() {

                return vat;

        }



        public void setVat(int vat) {

                if (vat >= 0)

                        this.vat = vat;

                setSellPrice();

        }



        public int getDiscount() {

                return discount;

        }



        public void setDiscount(int discount) {

                if (discount >= 0)

                        this.discount = discount;

                setSellPrice();

        }



        public double getSellPrice() {

                return sellPrice;

        }



        private void setSellPrice() {

                sellPrice = basePrice * (100 + vat - discount) / 100;

                if (sellPrice < 0)

                        sellPrice = 0;

        }



}

package com.bookPortal.modelTest;



import com.bookPortal.model.Book;



import junit.framework.TestCase;



public class BookTest extends TestCase{

        Book b = new Book();

        

        public void testSetBasePrice(){

                b.setBasePrice(10);

                assertEquals(10.0, b.getBasePrice());

        }

        public void testWrongSetBasePrice(){

                b.setBasePrice(-10);

                assertEquals(0.0, b.getBasePrice());

        }

        

        public void testSetVat(){

                b.setVat(10);

                assertEquals(10, b.getVat());

        }

        public void testWrongSetVat(){

                b.setVat(-10);

                assertEquals(0, b.getVat());

        }

        

        public void testSetDiscount(){

                b.setDiscount(10);

                assertEquals(10, b.getDiscount());

        }

        public void testWrongSetDiscount(){

                b.setDiscount(-10);

                assertEquals(0, b.getDiscount());

        }

        

        public void testSetSellPrice(){

                b.setBasePrice(10);

                b.setDiscount(0);

                b.setVat(18);

                assertEquals(11.80, b.getSellPrice());

        }

        public void testWrongSetSellPrice(){

                b.setBasePrice(0);

                b.setDiscount(50);

                b.setVat(18);

                assertEquals(0.0, b.getSellPrice());

        }



}

Tests successfull

Re: book class
 

setVat(discount); setDiscount(vat);

Re: book class
 

I am sure that someone, someday will understand what you are trying to tell us

Re: book class
 

so what a about the price

Re: book class
 

product owner responsibility: Put into a simple list, typical product owner responsibilities are:

decide on the project vision - who is going to benefit from the project and how;
secure funding;
continuously make decisions on the product priorities - what is more important with the latest information in mind;
continuously make decisions on maximizing the product ROI - make sure the features with the biggest benefit/cost ratio are developed first.

Re: book class
 

Re: book class
 

XP Practices:
-Collective ownership
-coding standards
-sustainable pace
-test first
-acceptance tests
-automation
-onsite customer
-continuous integration
-pair programming
-metaphor
-refactoring
-incremental design
-stories
-small releases
-planning game
-informatie workspace

Re: book class
 

What am I thinking right now? You should be able to guess correctly because I have seen the proof of how advanced your website to user mind reading capabilities are.