Description: J2EE patterns are a set of design patterns specifically used in Java 2 Platform, Enterprise Edition (J2EE) applications. These patterns provide proven solutions to common problems in enterprise application development, facilitating the creation of scalable, maintainable, and robust software. J2EE patterns cover various areas, including presentation management, business logic, and data access. Their main characteristics include separation of concerns, code reuse, and improved communication between components. By applying these patterns, developers can structure their applications in a way that adapts to changing requirements and evolving technology. Additionally, J2EE patterns promote standardization in development, allowing teams to work more efficiently and collaboratively. In summary, J2EE patterns are fundamental for application development in enterprise environments, as they offer a framework that helps developers tackle the complex challenges that arise in such projects.