This document contains code for a book management application including classes for: - BookSchema (bean class to store book details) - BookCollectionHelper (class to manage arraylist of books and add/get books) - BookDataValidator (class to validate book data on add) - BookException (custom exception class) - BookCollectionHelperTest (JUnit test class) - BookUI (main class with user interface to add/view books) The application allows the user to add new books by validating input, view total book count, and exits. It uses object-oriented design principles with classes for different components of the application.

1. BookCollectionHelper.java
package com.cg.helper;
import java.util.ArrayList;
import java.util.Iterator;
import com.cg.bean.BookSchema;
public class BookCollectionHelper {
private static ArrayList<BookSchema> bookList=null;
static
{
bookList=new ArrayList<BookSchema>();
BookSchema b1=new BookSchema(111,"See into the Sea of C",350);
BookSchema b2=new BookSchema(222,"Learning Java in 21 Days",450.50);
BookSchema b3=new BookSchema(333,"ASP.Net with C#", 250.75);
bookList.add(b1);
bookList.add(b2);
bookList.add(b3);
}
public BookCollectionHelper(){}
/*************Add New Book in ArrayList************/
public void addNewBookDetails(BookSchema book)
{
bookList.add(book);
}

2. public static ArrayList<BookSchema> getbookList() {
return bookList;
}
public static void setbookList(ArrayList<BookSchema> bookList) {
BookCollectionHelper.bookList = bookList;
}
/*************Fetch All Book Details ***********/
public static void displayBookCount()
{
Iterator<BookSchema> bookIt=bookList.iterator();
BookSchema tempBook=null;
int totalCount=0;
while(bookIt.hasNext())
{
totalCount++;
tempBook=bookIt.next();
System.out.println(tempBook);
}
System.out.println("Total Count of Books" + totalCount);
}
}

3. /************************************************************************************
/
BookCollectionHelperTest.java
package com.cg.junit;
import junit.framework.Assert;
import org.junit.Test;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import com.cg.bean.BookSchema;
import com.cg.exception.BookException;
import com.cg.helper.BookCollectionHelper;
public class BookCollectionHelperTest {
static BookCollectionHelper collectionHelper;
static BookSchema book=null;
@BeforeClass
public static void beforeClass()

4. {
collectionHelper=new BookCollectionHelper();
book =new BookSchema(888,"Neelima", 670.75);
}
@AfterClass
public static void afterClass()
{
collectionHelper=null;
book=null;
}
@Test
public void testAddNewBook() throws BookException
{
collectionHelper.addNewBookDetails(book);
//Assert.assertEquals(4, collectionHelper.getCustList().size());
Assert.assertNotNull(collectionHelper.toString());
}
}
/************************************************************************************
**********/

5. BookDataValidator.java
package com.cg.helper;
import java.util.regex.Pattern;
import com.cg.exception.BookException;
public class BookDataValidator {
public static boolean validateBookName(String bookName)throws BookException
{
String custPattern="[A-Za-z]{6,20}";
if(Pattern.matches(custPattern, bookName))
{
return true;
}
else
{
throw new BookException("Book Name should start with CAPITAL & Min 6 and
Max 20 characters Allowed");
}
}
public static boolean validateBookId(String bookId)throws BookException
{
String IdPattern="d{3}";
if(Pattern.matches(IdPattern, bookId))
{
return true;
}

6. else
{
throw new BookException("Only 3-digit BookID is Allowed");
}
}
public static boolean validateBookPrice(String bookPrice)throws BookException
{
String pricePattern="d{2,4}.?[0-9]{2}$";
if(Pattern.matches(pricePattern, bookPrice))
{
return true;
}
else
{
throw new BookException("Only numbers (and paise if any) is Allowed");
}
}
}
/************************************************************************************
*****************/
BookException.java

7. package com.cg.exception;
public class BookException extends Exception {
private static final long serialVersionUID = 1L;
public BookException()
{
super();
}
public BookException(String message, Throwable cause, boolean enableSuppression, boolean
writableStackTrace)
{
super(message, cause, enableSuppression, writableStackTrace);
}
public BookException(String message, Throwable cause)
{
super(message, cause);
}
public BookException(String message)
{
super(message);
}
public BookException(Throwable cause)
{
super(cause);
}
}

8. /************************************************************************************
***************/
BookSchema.java
package com.cg.bean;
public class BookSchema {
private int bookId;
private String bookName;
private double bookPrice;
public BookSchema() { }
public BookSchema(int bookId, String bookName, double bookPrice) {
this.bookId = bookId;
this.bookName = bookName;
this.bookPrice = bookPrice;
}
public int getBookId() {
return bookId;
}
public void setBookId(int bookId) {
this.bookId = bookId;
}
public String getBookName() {
return bookName;

9. }
public void setBookName(String bookName) {
this.bookName = bookName;
}
public double getBookPrice() {
return bookPrice;
}
public void setBookPrice(double bookPrice) {
this.bookPrice = bookPrice;
}
@Override
public String toString() {
return "Book [bookId=" + bookId + ", bookName="
+ bookName + ", bookPrice=" + bookPrice + "]";
}
}
/************************************************************************************
***************/
BookUI.java

10. package com.cg.ui;
import java.util.Scanner;
import com.cg.bean.BookSchema;
import com.cg.exception.BookException;
import com.cg.helper.BookCollectionHelper;
import com.cg.helper.BookDataValidator;
public class BookUI {
static Scanner sc=new Scanner(System.in);
static BookCollectionHelper collectionhelper=null;
@SuppressWarnings("static-access")
public static void main(String[] args) {
// TODO Auto-generated method stub
int choice=0;
collectionhelper=new BookCollectionHelper();
while(true)
{
System.out.println("1:Add New Book n"+
"2:Find total count of books n3:Exit");
System.out.println("nEnter UR Choice: ");
choice=sc.nextInt();

11. switch(choice)
{
case 1: enterNewBookDetails();break;
case 2: collectionhelper.displayBookCount();break;
default:System.exit(0);
}
}
}
private static void enterNewBookDetails()
{
System.out.println("How many new Books ? ");
int bcount=sc.nextInt();
while (bcount!=0) {
System.out.println("Enter Book Id:");
String bookId=sc.next();
try
{
if(BookDataValidator.validateBookId(bookId))
System.out.println("Enter Book name:");
String bookName=sc.next();
if(BookDataValidator.validateBookName(bookName))
{
System.out.println("Enter Price ");
String bookPrice =sc.next();
if(BookDataValidator.validateBookPrice(bookPrice))

12. {
BookSchema book=new
BookSchema(Integer.parseInt(bookId), bookName, Double.parseDouble(bookPrice));
collectionhelper.addNewBookDetails(book);
}
}
}
catch (BookException e)
{
System.out.println(e.getMessage());
}
bcount--;
}
}
}
/************************************************************************************
**********************/
help file for Book.txt

13. Note:
1. Include the jar files required for junit.
2. The executable file is : BookUI.java
-------
Create files in the following sequence :
1. BookSchema
2. BookUI
3. BookDataValidator & BookCollectionHelper
4. BookException & bbokCollectionHelperTest