Concepts and design principles of modern Java EE

The Java EE API is built around conventions and design principles that are present throughout the whole set of standards. Software engineers will find familiar API patterns and approaches while developing applications. Java EE aims to maintain consistent API usage.

For applications that focus on business use cases first, the most important principle of the technology is not getting in the way. As mentioned earlier, engineers should be able to focus on solving business problems, not spending the majority of their time dealing with technology or framework concerns. Ideally, the domain logic is implemented using plain Java and enhanced with annotations and aspects that enable enterprise environments without affecting or obfuscating the domain code. This implies that the technology doesn't need much engineer attention by enforcing overly complex constraints. In the past, J2EE required many of these overly-complex solutions. Managed beans as well...