Library needs help

Question

lgbagabuyo 0 Light Poster

12 Years Ago

public class Library {
public Library(String Libraries) {
}
private String Library;
public static void main(String[] args) {

Library firstLibrary = new Library("10 Main St.");
Library secondLibrary = new Library("228 Liberty St.");

//errors in this part, cannot find symbol
//Symbol: class book
//location: class library.library
firstLibrary.addBook(new Book("The Da Vinci Code")); <<<
firstLibrary.addBook(new Book("Le Petit Prince")); <<<
firstLibrary.addBook(new Book("A Tale of Two Cities")); <<<
firstLibrary.addBook(new Book("The Lord of the Rings"));<<<

System.out.println("Library hours:");
System.out.println("\nLibraries are open daily from 9am to 5pm");

//errors in this part, cannot find symbol
//symbol:method printAddress(java.lang.String)
//location:variable firstLibrary of type library.Library
System.out.println("Library addresses:");
firstLibrary.printAddress("10 Main St.");<<<
secondLibrary.printAddress("228 Liberty St.");<<<
System.out.println();
//errors in this part, cannot find symbol
//symbol:method borrowBook(java.lang.String)
//location:variable firstLibrary of type library.Library
System.out.println("Borrowing The Lord of the Rings:");
firstLibrary.borrowBook("The Lord of the Rings"); <<<
firstLibrary.borrowBook("The Lord of the Rings"); <<<
secondLibrary.borrowBook("The Lord of the Rings"); <<<
System.out.println();

//cannot find symbol
//symbol:method printAvailableBooks()
//location:variable firstLibrary of type library.Library
System.out.println("Books available in the first library:");
firstLibrary.printAvailableBooks();<<<
System.out.println();
System.out.println("Books available in the second library:");
secondLibrary.printAvailableBooks();<<<
System.out.println("II Return The Lords of the Rings to the first library");
System.out.println("Returning The Lord of the Rings:");

//cannot find symbol
/symbol:variable firstlibrary
//location:class library.Library
firstlibrary.returnBook("The Lord of the Rings");<<<
System.out.println("II Print the titles of available from the first library");
System.out.println("Books available in the first library:");
firstlibrary.printAvailableBooks();<<<
}}
NOTE: Codes with "<<<" have an errors listed above

THE OUTPUT:
Library hours:
Libraries are open daily from 9am to 5pm.
Library addresses:
10 Main St.
228 Liberty St.
Borrowing The Lord of the Rings:
You successfully borrowed The Lord of the Rings
Sorry, this book is already borrowed.
Sorry, this book is not in our catalog.
Books available in the first library:
The Da Vinci Code
Le Petit Prince
A Tale of Two Cities
Books available in the second library:
No book in catalog
Returning The Lord of the Rings:
You successfully returned The Lord of the Rings
Books available in the first library:
The Da Vinci Code
Le Petit Prince
A Tale of Two Cities
The Lord of the Rings

java

Edited 12 Years Ago by lgbagabuyo because: Updated

3 Contributors
10 Replies
266 Views
1 Week Discussion Span
Latest Post 12 Years Ago Latest Post by zeroliken

stultuske 1,116 Posting Maven

12 Years Ago

can you post your code in [ Code ] tags without the extra lines and symbols in?

stultuske 1,116 Posting Maven

12 Years Ago

well, basically, you're calling a lot of methods that don't exist.
also, you're trying to create instances of Book with a String param, but as far as I know, your Book class doesn't have such a constructor.

make sure you create all the methods you're using, or you'll automatically get error messages during compilation.

stultuske 1,116 Posting Maven

12 Years Ago

by implementing the missing methods.

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lgbagabuyo 0 Light Poster · Answer 1 · 2011-12-05T01:35:29+00:00

lgbagabuyo 0 Light Poster

12 Years Ago

Don't know where to start......

lgbagabuyo 0 Light Poster · Answer 2 · 2011-12-12T12:58:09+00:00

So far this is what I did can you help me with some errors?

public class Library {

    private static class ArrayList<T> {
        public ArrayList() {
        }
    }

    public static class Book {
        public Book() {
        }
    }
public Library(String address){
}  
public Library(String LibAddress, Book bk) {  
            address = LibAddress;  
            book = bk;  
        }
    String address;  
    String title;  
    int noOfBooks;  
    int date;
    Book book = new Book("Book Title");  
    ArrayList<Book> myArr = new ArrayList<Book>();  
    String[] myAr = new String[noOfBooks];  
    ArrayList<String> BookList = new ArrayList();  
    //ArrayList<Score> list = new ArrayList<Score>(); 
 public static void printOpeningHours() {  
            System.out.println("Library hours");  
            System.out.println("Libraries are open daily from 9am to 5pm.");   
        }      
public String getAddress(){  
            return address;     
        }
public void printAddress() {  
            System.out.println(address);  
        }  
public String getTitle () {  
            //if(title != null)  
            return title;  
        }
public void addBook(Book bookObject) {      
          if (bookObject != null && noOfBooks<4) {      
              //book[noOfBooks] = bookObject;  
              //myAr[noOfBooks] = book[noOfBooks];  
              noOfBooks++; //increase after adding one book to the Library      
           }// end if      
} // end add
public static void main(String[] args) {

Library firstLibrary = new Library("10 Main St.");
Library secondLibrary = new Library("228 Liberty St.");

firstLibrary.addBook(new Book("The Da Vinci Code")); 
firstLibrary.addBook(new Book("Le Petit Prince")); 
firstLibrary.addBook(new Book("A Tale of Two Cities")); 
firstLibrary.addBook(new Book("The Lord of the Rings"));

printOpeningHours();
System.out.println("Library addresses:"); 
firstLibrary.printAddress(); 
secondLibrary.printAddress(); 
System.out.println();

System.out.println("Borrowing The Lord of the Rings:"); 
firstLibrary.borrowBook("The Lord of the Rings"); 
firstLibrary.borrowBook("The Lord of the Rings"); 
secondLibrary.borrowBook("The Lord of the Rings"); 
System.out.println();

System.out.println("Books available in the first library:"); 
firstLibrary.printAvailableBooks();
System.out.println();
System.out.println("Books available in the second library:");
secondLibrary.printAvailableBooks();
System.out.println();II Return The Lords of the Rings to the first library 
System.out.println("Returning The Lord of the Rings:"); 
firstlibrary.returnBook("The Lord of the Rings");
System.out.println();
II Print the titles of available from the first library 
System.out.println("Books available in the first library:"); 
firstlibrary.printAvailableBooks();
}}

zeroliken 79 Nearly a Posting Virtuoso · Answer 3 · 2011-12-12T14:17:58+00:00

can you post your code in [ Code ] tags without the extra lines and symbols in?

Do we have to repeat?

lgbagabuyo 0 Light Poster · Answer 4 · 2011-12-12T14:31:03+00:00

public class Library {

private static class ArrayList<T> {
public ArrayList() {
}
}
public static class Book {
public Book() {
}
}
public Library(String address){
} 
public Library(String LibAddress, Book bk) { 
address = LibAddress; 
book = bk; 
}
String address; 
String title; 
int noOfBooks; 
int date;
Book book = new Book("Book Title"); 
ArrayList<Book> myArr = new ArrayList<Book>(); 
String[] myAr = new String[noOfBooks]; 
ArrayList<String> BookList = new ArrayList(); 
//ArrayList<Score> list = new ArrayList<Score>(); 
public static void printOpeningHours() { 
System.out.println("Library hours"); 
System.out.println("Libraries are open daily from 9am to 5pm."); 
} 
public String getAddress(){ 
return address; 
}
public void printAddress() { 
System.out.println(address); 
} 
public String getTitle () { 
//if(title != null) 
return title; 
}
public void addBook(Book bookObject) { 
if (bookObject != null && noOfBooks<4) { 
//book[noOfBooks] = bookObject; 
//myAr[noOfBooks] = book[noOfBooks]; 
noOfBooks++; //increase after adding one book to the Library 
}// end if 
} // end add
public static void main(String[] args) {

Library firstLibrary = new Library("10 Main St.");
Library secondLibrary = new Library("228 Liberty St.");

firstLibrary.addBook(new Book("The Da Vinci Code")); 
firstLibrary.addBook(new Book("Le Petit Prince")); 
firstLibrary.addBook(new Book("A Tale of Two Cities")); 
firstLibrary.addBook(new Book("The Lord of the Rings"));

printOpeningHours();
System.out.println("Library addresses:"); 
firstLibrary.printAddress(); 
secondLibrary.printAddress(); 
System.out.println();

System.out.println("Borrowing The Lord of the Rings:"); 
firstLibrary.borrowBook("The Lord of the Rings"); 
firstLibrary.borrowBook("The Lord of the Rings"); 
secondLibrary.borrowBook("The Lord of the Rings"); 
System.out.println();

System.out.println("Books available in the first library:"); 
firstLibrary.printAvailableBooks();
System.out.println();
System.out.println("Books available in the second library:");
secondLibrary.printAvailableBooks();
System.out.println();II Return The Lords of the Rings to the first library 
System.out.println("Returning The Lord of the Rings:"); 
firstlibrary.returnBook("The Lord of the Rings");
System.out.println();
II Print the titles of available from the first library 
System.out.println("Books available in the first library:"); 
firstlibrary.printAvailableBooks();
}}

stultuske 1,116 Posting Maven Featured Poster · Answer 5 · 2011-12-12T14:33:55+00:00

stultuske 1,116 Posting Maven

12 Years Ago

and ... what are the errors that remain?

lgbagabuyo 0 Light Poster · Answer 6 · 2011-12-12T16:36:11+00:00

public class Library {
 
private static class ArrayList<T> {
public ArrayList() {
}
}
public static class Book {
public Book() {
}
}
public Library(String address){
} 
public Library(String LibAddress, Book bk) { 
address = LibAddress; 
book = bk; 
}
String address; 
String title; 
int noOfBooks; 
int date;
Book book = new Book("Book Title"); 
ArrayList<Book> myArr = new ArrayList<Book>(); 
String[] myAr = new String[noOfBooks]; 
ArrayList<String> BookList = new ArrayList(); 
//ArrayList<Score> list = new ArrayList<Score>(); 
public static void printOpeningHours() { 
System.out.println("Library hours"); 
System.out.println("Libraries are open daily from 9am to 5pm."); 
} 
public String getAddress(){ 
return address; 
}
public void printAddress() { 
System.out.println(address); 
} 
public String getTitle () { 
//if(title != null) 
return title; 
}
public void addBook(Book bookObject) { 
if (bookObject != null && noOfBooks<4) { 
//book[noOfBooks] = bookObject; 
//myAr[noOfBooks] = book[noOfBooks]; 
noOfBooks++; //increase after adding one book to the Library 
}// end if 
} // end add
public static void main(String[] args) {
 
Library firstLibrary = new Library("10 Main St.");
Library secondLibrary = new Library("228 Liberty St.");
 
firstLibrary.addBook(new Book("The Da Vinci Code")); 
firstLibrary.addBook(new Book("Le Petit Prince")); 
firstLibrary.addBook(new Book("A Tale of Two Cities")); 
firstLibrary.addBook(new Book("The Lord of the Rings"));
 
printOpeningHours();
System.out.println("Library addresses:"); 
firstLibrary.printAddress(); 
secondLibrary.printAddress(); 
System.out.println();
 
System.out.println("Borrowing The Lord of the Rings:"); 
firstLibrary.borrowBook("The Lord of the Rings"); 
firstLibrary.borrowBook("The Lord of the Rings"); 
secondLibrary.borrowBook("The Lord of the Rings"); 
System.out.println();
 
System.out.println("Books available in the first library:"); 
firstLibrary.printAvailableBooks();
System.out.println();
System.out.println("Books available in the second library:");
secondLibrary.printAvailableBooks();
System.out.println();II Return The Lords of the Rings to the first library 
System.out.println("Returning The Lord of the Rings:"); 
firstlibrary.returnBook("The Lord of the Rings");
System.out.println();
II Print the titles of available from the first library 
System.out.println("Books available in the first library:"); 
firstlibrary.printAvailableBooks();
}}

The highlight with red are errors, what to do? Im looking for solutions.

zeroliken 79 Nearly a Posting Virtuoso · Answer 7 · 2011-12-12T16:38:11+00:00

are these included in your code?

import java.io.*;
import java.util.*;

you made an obvious mistake here use // for comments

System.out.println();II Return The Lords of the Rings to the first library

include methods in your class

public static class Book {
public Book() {
}
}

addBook(and most of the others) method should be in the Book class

firstLibrary.addBook(new Book("The Da Vinci Code")); 
firstLibrary.addBook(new Book("Le Petit Prince")); 
firstLibrary.addBook(new Book("A Tale of Two Cities")); 
firstLibrary.addBook(new Book("The Lord of the Rings"));

Stultuske already corrected your errors before:

well, basically, you're calling a lot of methods that don't exist.
also, you're trying to create instances of Book with a String param, but as far as I know, your Book class doesn't have such a constructor.
make sure you create all the methods you're using, or you'll automatically get error messages during compilation.