The code that implements the functionality of an application. In the Enterprise JavaBeans architecture, this logic is implemented by the methods of an enterprise bean.

In the context of advanced Java or any other programming environment, business logic refers to the specific set of rules, algorithms, and processes that define the workflow and decision-making processes within an application or system. It represents the core functionality of the application that is designed to meet the specific business requirements.

Business logic is responsible for processing and manipulating data, performing calculations, enforcing business rules, and making decisions based on the input and state of the application. This logic encapsulates the unique operations and rules that are essential for the application to fulfill its intended purpose in accordance with the business requirements.

In a typical Java application, business logic is often implemented in Java classes and methods. These classes and methods are responsible for handling the underlying functionality of the application, while other components, such as the user interface and data storage, interact with the business logic to provide a complete and functional system.

In summary, business logic in the context of advanced Java refers to the set of rules and processes that define the core functionality of an application, allowing it to perform specific tasks and operations to meet the requirements of a particular business or domain.