Book.java

/**
 * Represents a book in the library management system.
 */
public class Book {
    private int bookId;
    private String title;
    private String author;
    private boolean isIssued;

    public Book(int bookId, String title, String author) {
        this.bookId = bookId;
        this.title = title;
        this.author = author;
        this.isIssued = false;
    }

    // Getters and Setters
    public int getBookId() {
        return bookId;
    }

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public boolean isIssued() {
        return isIssued;
    }

    public void setIssued(boolean issued) {
        isIssued = issued;
    }

    @Override
    public String toString() {
        return String.format("ID: %d | Title: %-20s | Author: %-15s | %s", 
            bookId, title, author, (isIssued ? "[Issued]" : "[Available]"));
    }
}