Thread: File input using Scanner help.

Ok so i have an assignment I'm working on where i have to write a program that has to:

1. Read the elements of a book(id, title, isbn, author, genre) from a text file.
2. Place these elements into a Book object.
3. Place these Book objects into a Book type array.
4. Prompt user to enter a an id for a Book and program should reply with all information about the book(ex: User enters "12345" and program should print to screen: Id: 12345, Title: Jimmy Cracked Corn, ISBN: 124512345, Author: JohnDoe, Genre: Fiction)

Now i am stuck on the part where i have to read in more and place more than one book object into the Book array. Here is my code so far.

package assg2_Harris;
 
import java.util.*;
import java.io.*;
 
public class FileInput extends Book{
 
public static void main(String[] args) {
 
	Scanner inStream = null;
 
	Book[] Catalog = new Book[100];
	int count = 0;
 
	try
	{
		inStream = new Scanner(new File("catalog.txt"));
	}
	catch(FileNotFoundException x)
	{
		System.out.println("File not found.");
	}	
	while(inStream.hasNextLine()){	
		Catalog[count] = new Book(inStream.nextInt(),inStream.next(),inStream.nextInt(),inStream.next(),inStream.next());
		System.out.println(Catalog[count]);
		count++;
	}
	inStream.close(); 
        System.out.println(Catalog[count]);
	}
}

Here is my code for the book class also:

package assg2_Harris;
 
import java.util.*;
 
import java.io.*;
 
public class Book {
 
	private int bookid;
	private String bookname;
	private int isbn;
	private String author;
	private String genre;
 
	public Book(){
		bookid = 0;
		bookname = "";
		isbn = 0;
		author = "";
		genre = "";
	}
	public Book(int id, String title, int i, String name, String genre){
		bookid = id;
		bookname = title;
		isbn = i;
		author = name;
		this.genre = genre ;
	}
 
	public int getBookId(){
		return  bookid;
	}
 
	public String getBookname() {
		return bookname;
	}
 
	public int getIsbn() {
		return isbn;
	}
 
	public String getAuthor() {
		return author;
	}
 
	public String getGenre() {
		return genre;
	}
 
	public String toString(){
		return ("Book id: " + bookid + ", Title: " + bookname + ", ISBN: " 
				+ isbn + ", Author: " 
				+ author + ", Genre: " + genre); 
	}

And also my txt file looks like this:

12345 Emma 0111111111 Rowling Fiction
15678 Timmy 135378564 Jesus NonFiction

Now i'm having a problem with this line file input class:

Catalog[count] = new Book(inStream.nextInt(),inStream.next(),inStream.n extInt(),inStream.next(),inStream.next());

The print statement is under it to see whats going on inside the array.

Anyway when I try to run my program this is what happens:

Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at assg2_Harris.FileInput.main(FileInput.java:24)
Book id: 12345, Title: Emma, ISBN: 111111111, Author: Rowling, Genre: Fiction.

Please help i have no idea why the lines inside the while loop aren't working for what i want to do....

Here's the link to my assignment prompt if you want to take a look at that.
https://blackboard.ecu.edu/bbcswebda...ssignment2.pdf

What do you mean by there's no data available to read? I thought each next method gets a specific piece of information from my text file and stores into into the variables in my Book object. I can get it to work for one Book object if i take it out of the while loop but as soon as i put a while loop around it i get the error.

How would i go about printing it out as it's read in since it's only being read in parameters?