Question

using java

Define a class Library based on the following specifications: a. A library can have multiple books. Decide on the best possible data structure to store books. b. A library has a name. c. A library has an address. Define a 2-argument constructor for the Library class. Decide on the arguments needed for this constructor. e. Define a method that can add new books to the library. f. Define a method that allows a book to be borrowed (checked out). Note: a book can be borrowed if and only if it's available. Decide what parameter(s) if any to pass to this method and if this method needs to return a value (if any). 9. Define a method that allows a book to be returned to the library (checked in). Decide what parameter(s) if any to pass to this method and if this method needs to return a value (if any). h. Define a method that allows a library to be searched for a given book based on the book's ISBN. Decide what parameter(s) if any to pass to this method and if this method needs to return a value (if any). 1. Define a method to print the name and address of the library plus the list of books the library has.

Answer 1

Book.java

public class Book {

   String title;
   String author;
   String publisher;
   String ISBN;
   String copyrightDate;
   boolean borrowed;
  
   public Book(String title, String author, String publisher, String iSBN, String date) {
       super();
       this.title = title;
       this.author = author;
       this.publisher = publisher;
       ISBN = iSBN;
       this.copyrightDate = date;
      
   }

   public String getTitle() {
       return title;
   }

   public void setTitle(String title) {
       this.title = title;
   }

   public String getAuthor() {
       return author;
   }

   public void setAuthor(String author) {
       this.author = author;
   }

   public String getPublisher() {
       return publisher;
   }

   public void setPublisher(String publisher) {
       this.publisher = publisher;
   }

   public String getISBN() {
       return ISBN;
   }

   public void setISBN(String iSBN) {
       ISBN = iSBN;
   }

   public String getCopyrightDate() {
       return copyrightDate;
   }

   public void setCopyrightDate(String copyrightDate) {
       this.copyrightDate = copyrightDate;
   }

   public boolean isBorrowed() {
       return borrowed;
   }

   public void setBorrowed(boolean borrowed) {
       this.borrowed = borrowed;
   }

   @Override
   public String toString() {
       return "Book [title=" + title + ", author=" + author + ", publisher=" + publisher + ", ISBN=" + ISBN
               + ", copyrightDate=" + copyrightDate + ", borrowed=" + borrowed + "]";
   }

  

   @Override
   public boolean equals(Object obj) {
       if (this == obj)
           return true;
       if (obj == null)
           return false;
       if (getClass() != obj.getClass())
           return false;
       Book other = (Book) obj;
       if (ISBN == null) {
           if (other.ISBN != null)
               return false;
       } else if (!ISBN.equals(other.ISBN))
           return false;
       return true;
   }
  
  
  
  
}

Library.java

import java.util.ArrayList;

public class Library {

   String name;
   String address;
   ArrayList<Book> books;
   public Library(String name, String address) {
       super();
       this.name = name;
       this.address = address;
       this.books = new ArrayList<>();
   }
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }
   public String getAddress() {
       return address;
   }
   public void setAddress(String address) {
       this.address = address;
   }
   public ArrayList<Book> getBooks() {
       return books;
   }
   public void setBooks(ArrayList<Book> books) {
       this.books = books;
   }
  
   public void addBook(Book book) {
      
       books.add(book);
   }
  
   public boolean checkout(String ISBN) {
      
       if(books.size()>0) {
           for(int i=0;i<books.size();i++)
               if(books.get(i).getISBN().compareToIgnoreCase(ISBN)==0) {
                   if(!books.get(i).isBorrowed()) {
                   books.get(i).setBorrowed(true);
                   return true;
                   }
               }
          
       }
      
       return false;
   }
  
   public boolean checkIn(String ISBN) {

       if(books.size()>0) {
           for(int i=0;i<books.size();i++)
               if(books.get(i).getISBN().compareToIgnoreCase(ISBN)==0) {
                   if(books.get(i).isBorrowed()) {
                   books.get(i).setBorrowed(false);
                   return true;
                   }
               }
          
       }
      
       return false;
   }
  
   public Book searchBook(String ISBN) {
      
       if(books.size()>0) {
           for(int i=0;i<books.size();i++)
               if(books.get(i).getISBN().compareToIgnoreCase(ISBN)==0) {
                   return books.get(i);
                  
               }
          
       }
      
       return null;
   }
  
   public void print() {
       System.out.println("Name of Library : "+name);
       System.out.println("Address of Library : "+address);
       books.forEach(s->System.out.println(s));
   }
}

TestLibrary.java

public class TestLibrary {

   public static void main(String[] args) {
       // TODO Auto-generated method stub

       Book book = new Book("Title", "author", "publisher", "iSBN", "date");
       Library library = new Library("Library", "Washington");
      
       library.addBook(book);
       library.addBook(new Book("Title1", "author1", "publisher1", "iSBN1", "date1"));
      
       boolean flag = library.checkout("iSBNs");
      
       if(flag)
           System.out.println("Book with iSBNs is CheckedOut Succesfully");
      
       else
           System.out.println("Book with iSBNs is already CheckedOut or not available");
      
flag = library.checkIn("iSBN");
      
       if(flag)
           System.out.println("Book with iSBN is CheckedIn Succesfully");
      
       else
           System.out.println("Book with iSBN is already CheckedIN or not available");
      
      
       Book book1 = library.searchBook("isbn1");
      
       System.out.println("Book searched is "+book1);
      
      
       System.out.println("Printing library Details");
       library.print();
   }

}

Output

Book with iSBNs is already CheckedOut or not available
Book with iSBN is CheckedIn Succesfully
Book searched is Book [title=Title1, author=author1, publisher=publisher1, ISBN=iSBN1, copyrightDate=date1, borrowed=false]
Printing library Details
Name of Library : Library
Address of Library : Washington
Book [title=Title, author=author, publisher=publisher, ISBN=iSBN, copyrightDate=date, borrowed=false]
Book [title=Title1, author=author1, publisher=publisher1, ISBN=iSBN1, copyrightDate=date1, borrowed=false]

Feel free to ask any doubts, if you face any difficulty in understanding.

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