Traversing Java Object Arrays [migrated]
- by Sundi
Please Help. Program does not read Array rentBooks[] in the for() loop
this option is selected when choosing option 2 then option 4 in the menu
The Array reads perfectly when reading the items after the setBook() Method
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
import java.io.*;
import java.util.Locale;
import java.text.SimpleDateFormat ;
class Library
{
protected static String Author;
protected static String Title;
SimpleDateFormat PublicationDate;
int itemCode;
int available = 1;
}
class Book extends Library
{
protected static String PublisherName;
protected static String Edition;
static Book[] rentBooks = new Book[5];
//Book[] rentBooks = new Book[5];
int count = 0;
public Book()
{
String start= "start";
showBook.main(anza);
}
public void setBook( String Auth, String Titl, String PublishName)
{
this.Author = Auth;
this.Title = Titl;
this.PublisherName = PublishName;
}
public void getBook()
{
//System.out.println("*************BOOKS*************************");
System.out.println( "\n\nThe Author of the first Book is "+ this.Author );
System.out.println( "The Title of the book is "+ this.Title);
System.out.println( "The Publisher of the book is "+ this.PublisherName );
// System.out.println( "The Edition of the book is "+ Edition );
}
}
class showBook{
static Book[] rentBooks = new Book[5];
static Book[] rentBooks2 = new Book[5];
static int a,b;
//for ( a=0; a < 5; a++ )
//rentBooks2[a] = new Book();
public static void main(String[] args)
{
File file = new File("Book2.txt");
//Book libraryBooks = new Book();
int j;
//initialise Array Class Objects
for( j = 0; j < 5; j++) {
rentBooks[j] = new Book(); }
int i = 0;
try{
Scanner scanner = new Scanner(file);
scanner.useDelimiter(",");
String loan="";
int loan2;
while( scanner.hasNextLine())
{ //Should the Books be Stored in An Array?
// At the moment you have separate objects stored in unknown location
String Author = scanner.next();
String Title = scanner.next();
String PublisherName = scanner.next();
if ( i < 4)
{
System.out.println(i);
rentBooks[i].setBook(Author, Title, PublisherName);
rentBooks[i].getBook(); // MEMBERS SHOWN
i++;
}
public class readBook4{
public static void main(String[] args)
{
int number =0;
System.out.println( "Please select one of the choices below " );
System.out.println( "Select option 1 to list all items in the library ");
System.out.println( "Select option 2 to list the items by category");
System.out.println( "Select option 3 to choose item available in the library ");
System.out.println( "Select option 7 to exit " );
InputStreamReader isr = new InputStreamReader( System.in);
BufferedReader buffer = new BufferedReader( isr);
String input = "";
try
{
input = buffer.readLine();
number = Integer.parseInt(input);
//int number = Integer.parseInt( Edition);
if ( number == 1 )
{
System.out.println( " \nThanks you are reading "+ input);
//showStudent.main(args);
showPeriodical.main(args);
showDVD.main(args);
// showBook.main(args);
}
if ( number == 2 )
{
//jht.cls();
int number2;
System.out.println( "Please select one of the choices below " );
System.out.println( "Select option 4 to list Books only ");
System.out.println( "Select option 5 to list the Periodicals only");
System.out.println( "Select option 6 to list DVDs only");
InputStreamReader isr2 = new InputStreamReader(System.in);
BufferedReader buffer2 = new BufferedReader(isr2);
String input2 = "";
try
{
input2 = buffer2.readLine();
buffer.close();
}
catch(IOException e)
{
System.out.println("An input error has occured");
}
//System.out.println("Thanks, you are reading" + input2);
number2 = Integer.parseInt(input2);
if ( number2 == 4 )
{
showBook.main(args);
}
if ( number2 == 5 )
{
showPeriodical.main(args);
}
if ( number2 == 6 )
{
showDVD.main(args);
}
// readBook4.main(args);
}
if( number == 3 )
{
//showBook.main(args);
showBook.availableBooks();
showDVD.availableDVD();
showPeriodical.availablePeriodical();
}
if ( number == 7 )
{
showStudent.main(args);
}
buffer.close();
}
catch( IOException e )
{
System.out.println( " An input error has occured ");
}
//System.out.println( " \nThanks you are reading "+ input);
}
}
}
//buffer.close();
scanner.close();
}
catch( FileNotFoundException e)
{
System.out.println("File not Found");
}
for ( i=0; i < 5; i++ )
rentBooks[i].getBook(); //ARRAY NOT SHOWN
}
}
