Update framework to support modern JDK versions #32
Description
Description
The framework currently recommends JDK 7, which is outdated and no longer supported.
Expected improvement
Test and update the codebase to be compatible with JDK 8 through JDK 21.
Additional context
Many developers are now using newer Java versions, and some tools (IDEs, build systems) may not fully support JDK 7 anymore.
Suggestion
Update README to recommend at least JDK 8 and verify compatibility.