What are Business Objects and what is Business Logic?

Question

When reading, I keep seeing references to what they call Business Objects. I\'ve looked up on Wikipedia and such but I keep not getting what a Business Ob

Answer 1

Business Object:

class User {
    long id;
    String fullNames;
    int age;
}

class Book {
    long id;
    String bookTitle;
}

class Sales {
    long id;
    long userID;
    long bookID;
}

Business Logic:

class BookSalesController {
    private User user = new User();
    private Book book = new Book();
    private Sales sale = null;

    public Sale sale(long saleID) {
        String query = "SELECT * FROM Sales s WHERE s.id = :saleID";
        ....
        .... execute the query

        // Assuming we have our Result Set here by now

        if (rs.next()) {
            sale = new Sales(rs.getString("User Names"));
            sale.setUserID(rs.getLong(userID));
            sale.setBookID(rs.getLong(bookID));
        }

        return sale;
    }
}