This library system allows users to check in and check out books, view available and unavailable books, and manage a collection of books. The system is designed with a user-friendly console interface.
The Main class is the entry point for the library system. It initializes the library, displays books, and manages user interactions.
Book[] library: An array to store all books in the library.Book[] availableBooksList: An array to store available books.Book[] unAvailableBooksList: An array to store unavailable books.List<String> exitOptions: A list of options for exiting the program.final static String CHECKOUT: Constant string for checking out books.final static String CHECKIN: Constant string for checking in books.
public static void main(String[] args): The main method that runs the application.private static void homeScreen(): Prompts users with a multi-choice menu and directs them based on their selections.private static void checkInOrOut(String option): Allows users to check in or check out a book based on their choice.private static void printMenu(String header, String... options): Prints the menu for the library system.private static Book[] unAvailableBooks(Book[] library): Returns an array of books that are currently unavailable.private static Book[] availableBooks(Book[] books): Returns an array of books that are currently available.public static void displayBooks(Book[] books): Displays the current status of the books in the library.private static Book[] getInitializedLibrary(): Initializes the library with a set of predefined books.
The Console class provides utility methods for prompting user input through the console.
public static String promptForString(): Prompts the user for a string input and returns the value.public static String promptForString(String prompt): Prompts the user with a specified message and returns the input string.public static boolean promptForYesNo(String prompt): Prompts the user with a yes/no question and returns a boolean value indicating their response.public static short promptForShort(String prompt): Prompts the user for a short integer input and returns the value.public static byte promptForByte(String prompt): Prompts the user for a byte input and returns the value.
The Book class represents a book within the library system, encapsulating its properties and behaviors.
private int id: The unique identifier for the book.private String isbn: The ISBN of the book.private String title: The title of the book.private boolean isCheckedOut: Indicates if the book is checked out.private String checkedOutTo: The name of the person who has checked out the book.
public Book(): Default constructor.public Book(int id, String title, String isbn): Initializes a book with an ID, title, and ISBN, settingisCheckedOuttofalseandcheckedOutToto an empty string.
public int getId(): Returns the ID of the book.public void setId(int id): Sets the ID of the book.public String getIsbn(): Returns the ISBN of the book.public void setIsbn(String isbn): Sets the ISBN of the book.public String getTitle(): Returns the title of the book.public void setTitle(String title): Sets the title of the book.public boolean isCheckedOut(): Returns whether the book is checked out.public void setCheckedOut(boolean checkedOut): Sets the checked-out status of the book.public String getCheckedOutTo(): Returns the name of the person who has checked out the book.public void setCheckedOutTo(String checkedOutTo): Sets the name of the person who has checked out the book.public void checkOut(String name): Checks out the book to a person with the specified name.public void checkIn(): Resets the book's status to indicate it is available.@Override public boolean equals(Object o): Compares this book with another object for equality.@Override public int hashCode(): Returns the hash code of the book.@Override public String toString(): Returns a string representation of the book.
To run the library system, execute the main method in the Main class. Users will be prompted to view available books, checked-out books, or exit the program. The system allows for interactive check-in and check-out of books through a simple console interface.