Gunasekhar
Posts: 7
Nickname: dguna
Registered: Nov, 2004
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Re: Adding an object as an array
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Posted: Dec 13, 2004 10:06 PM
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Hi
May be you can also try this code for adding & displaying:
import java.io.*;
import java.util.*;
public class BookStore {
static InputStreamReader isr = new InputStreamReader(System.in);
static BufferedReader br = new BufferedReader(isr);
static Vector arrayBook = new Vector();
public static void main (String [] arg) throws Exception {
final int iSize = 200;
int choice = 5;
//Book book = new Book (iISBN, sTitle, iQuantity);
//arrayBook.add(book);
do {
System.out.println("Select your menu option: ");
System.out.println("1. Add Book");
System.out.println("2. Remove Book");
System.out.println("3. Search Book");
System.out.println("4. Show All");
System.out.println("5. Exit");
System.out.println("Choice[1,2,3,4,5]: ");
choice = Integer.parseInt(br.readLine());
switch(choice) {
case 1:
addBook();
break;
case 2:
//removeBook();
break;
case 3:
//searchBook();
break;
case 4:
showBooks();
break;
case 5:
break;
default:
System.out.println("Invalid Entry!! Please try again ...");
}
}while(choice!=5);
}//close main
public static void addBook() throws Exception {
int iISBN = 0, iQuantity = 0;
String iTitle = "";
//getting the ISBN number
boolean bISBN = false;
while(!bISBN) {
System.out.print("Enter the ISBN number: ");
String sISBN = br.readLine();
sISBN = sISBN.trim();
try {
int iOtherISBN = Integer.parseInt(sISBN);
if(iOtherISBN >= 0 && iOtherISBN <= 199) {
iISBN = iOtherISBN;
bISBN = true;
}//end if
}//end try
catch (NumberFormatException nfe) {
System.out.println("Number not within 0-199, back to the menu.");
bISBN = false;
}//end catch
}//end while
//getting the Title
boolean bTitle = false;
while(!bTitle) {
System.out.print("Enter your Title: ");
String sOtherTitle = br.readLine();
sOtherTitle = sOtherTitle.trim();
if(sOtherTitle.length() !=0) {
iTitle = sOtherTitle;
bTitle = true;
}//end if
else {
System.out.println("Your title is blank, go back to the menu");
bTitle = false;
}//end else
}//end while
//getting the quantity
boolean bQty = false;
while(!bQty) {
System.out.print("Quantity of books: ");
String sQty = br.readLine();
sQty = sQty.trim();
try {
int iOtherQuantity = Integer.parseInt(sQty);
if (iOtherQuantity >=0) {
iQuantity = iOtherQuantity;
bQty = true;
}//end if
else {
System.out.println("Your number is negavtive, go back to menu.");
bQty = false;
}//end else
}//end try
catch (NumberFormatException nfe) {
System.out.println("You did not enter a number, back to the menu you go.");
bQty = false;
}//end catch
}//end while
//if all entries are available...
if(bISBN && bTitle & bQty) {
int flag = 1;
for(int i=0;i<arrayBook.size();i++) {
Book b = (Book)arrayBook.elementAt(i);
if(b.sTitle.equals(iTitle)) {
flag = 0;
break;
}
}
if(flag == 1) {
Book b = new Book(iISBN,iTitle,iQuantity);
arrayBook.add(b);
}
else {
System.out.println("Book exists in there, cannot add, try again.");
}
}
}//close addBook
public static void showBooks() {
for(int i=0;i < arrayBook.size(); i++) {
Book b = (Book)arrayBook.elementAt(i);
System.out.println("Details of Book" + (i+1) + "...");
System.out.println("iISBN: " + b.iISBN);
System.out.println("Title: " + b.sTitle);
System.out.println("Quantity: " + b.iQuantity);
}
}
}//close class
class Book {
String sTitle;
int iISBN;
int iQuantity;
Book(int iISBN, String sTitle, int iQuantity) {
this.iISBN = iISBN;
this.sTitle = sTitle;
this.iQuantity = iQuantity;
}
}
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