01
Android
Rendering, layout, animation, memory behavior, and the practical work of meeting a frame budget.
02
Java UI
Swing, Java2D, compositing, look-and-feel systems, and exploratory desktop interface demos.
03
Method
Small reproducible experiments, explicit constraints, and conclusions tied to observable behavior.
Working rule
Make the next measurement cheaper than the next argument.
Keep a minimal reproduction close to the observation. Change one variable at a time, preserve the failing path, and prefer before-and-after evidence over a broad rewrite.