AspectJ

AspectJ is a programming tool that helps developers improve and manage complex software by allowing them to add common features—like logging, security, or error handling—across many parts of a program without altering each one individually. It uses a concept called "aspect-oriented programming" to separate these cross-cutting concerns from the main logic, making the code cleaner and easier to maintain. Essentially, AspectJ acts like a set of rules that automatically apply these shared features everywhere needed, streamlining development and reducing repetitive code.