source: doc/theses/andrew_beach_MMath/code/ThrowFinally.java @ c8238c0

// Throw Across Finally

class EmptyException extends Exception {}

public class ThrowFinally {
        private static void unwind_finally(int frames)
                        throws EmptyException {
                if (0 < frames) {
                        try {
                                unwind_finally(frames - 1);
                        } finally {
                                // ...
                        }
                } else {
                        throw new EmptyException();
                }
        }

        private static long loop(int times, int total_frames) {
                long startTime = System.nanoTime();
                for (int count = 0 ; count < times ; ++count) {
                        try {
                                unwind_finally(total_frames);
                        } catch (EmptyException e) {
                                // ...
                        }
                }
                long endTime = System.nanoTime();
                return endTime - startTime;
        }

        public static void main(String[] args) {
                int times = 1;
                int total_frames = 1;
                if (0 < args.length) {
                        times = Integer.parseInt(args[0]);
                }
                if (1 < args.length) {
                        total_frames = Integer.parseInt(args[1]);
                }

                // Warm-Up:
                loop(1000, total_frames);

                long time = loop(times, total_frames);
                System.out.format("Run-Time (s): %.1f%n", time / 1_000_000_000.);
        }
}