Help with some java work ... :(

Question

Hi, I was wondering can anyone here give me some help or show me the way with this programming assignment. This is my first week of programming in Java and is really struggling ...
I already have some very useful help from some people on here but still have no luck.
Below is what my assignment is about and what I've done so far, sorry if it's very basic but I'm trying my hardest.
You are required to write a program in Java that can store the details of three books. Their details are
Author
Shelf location
Availability
The program should give each book a unique shelf location starting from 0001. The details should be entered from the keyboard. The program should, on request, be able to print the details of each book to the screen. The program should terminate on request. The program should first ask for a preset password to be given before continuing executing any operation described above
public class Library {
public static void main(String[] args) {
String[][] books =
     { "Shelf Location", "Author   ", "Book Name     ", "Availability" },
{ "0001          ", "A. Smith ", "Hello World   ", "1           " },
{ "0002          ", "C. Jones ", "Goodbye World ", "0           " },
{ "0003          ", "D. Wan   ", "Whatever      ", "5           " }
for (int i = 0; i < books.length; i++) {
     System.out.print(books[0] + " ");
for (int j = 1; j < books[i].length; j++) {
     System.out.print(books[i][j] + " ");
     System.out.println();
import java.io.*;
public class Login2
private static BufferedReader in;
private static BufferedReader keyboard;
public static void main(String[] args) throws IOException
keyboard = new BufferedReader(
new InputStreamReader(System.in));
String input;
boolean done = false;
while (!done)
System.out.print("Enter Password in UPPERCASE (QUIT to exit)");
input = keyboard.readLine();
if ((input.equals("LOGIN")) || (input.equalsIgnoreCase("QUIT")))
done =
true;
return.Library();
I was told to use cases, instances, etc ... nothing complicated is needed but it is still to much for me. I saw some examples of people's work and they only have approx 1.5 pages of code.
Thanx very much for people who reads this thread and offers me help.

Answer 1

Here's something to play around with (minimal error handling)
import java.io.*;
class Library
  private final String password = "java";
  BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  private String books[][] = new String[3000][];
  int bookTotal = 0;
  public Library() throws IOException
    options();
  private void options() throws IOException
    System.out.print("\nLibrary Options - \n0 - quit\n1 - Enter book details"+
          "\n2 - List book details\n\nPlease enter selection number: ");
    int selection = Integer.parseInt(br.readLine());
    if(selection == 0) goodBye();
    else
      checkPassword();
      if(selection == 1) newBook();
      else listBook();
  private void newBook() throws IOException
    String another="";
    do
      if(bookTotal == books.length)
        System.out.println("Unable to add more books");
        return;
      books[bookTotal] = new String[4];
      System.out.print("\nEnter title details: ");
      books[bookTotal][0] = br.readLine();
      System.out.print("Enter author details: ");
      books[bookTotal][1] = br.readLine();
      System.out.print("Enter shelf location details: ");
      books[bookTotal][2] = br.readLine();
      System.out.print("\n0 - out of stock\n1 - available\n2 - on loan"+
                                       "\nEnter availability details: ");
      books[bookTotal][3] = br.readLine();
      bookTotal++;
      System.out.print("\nEnter another book? (y/n): ");
      another = br.readLine();
    }while(another.toLowerCase().equals("y"));
    options();
  private void listBook() throws IOException
    String another="";
    String titles = "\n";
    String availability[] = {"out of stock","available","on loan"};
    for(int i=0;i<bookTotal;i++) titles += (i+1)+" - "+books[0]+"\n";
int selection = 0;
if(bookTotal > 0)
do
System.out.print(titles+ "Please enter selection number: ");
selection = Integer.parseInt(br.readLine()) - 1;
System.out.println("\nBook title = "+books[selection][0]);
System.out.println("Book author = "+books[selection][1]);
System.out.println("Book shelf location = "+books[selection][2]);
System.out.println("Availability = "+availability[Integer.parseInt(books[selection][3])]);
System.out.print("\nList another book? (y/n): ");
another = br.readLine();
}while(another.toLowerCase().equals("y"));
else System.out.println("\nno books to list\n");
options();
private void goodBye()
System.out.println("\nThank you for using the Library program.\nGoodbye.\n");
System.exit(0);
private void checkPassword() throws IOException
System.out.print("\nEnter password to continue: ");
String pwd = br.readLine();
if(!pwd.equals(password)) goodBye();
public static void main(String args[]) throws IOException
new Library();