source: doc/theses/andrew_beach_MMath/code/CondCatch.java @ 01865fb

// Conditional Match (or Re-Raise)

class EmptyException extends Exception {}

public class CondCatch {
        static boolean should_catch = false;

        private static long loop(int times) {
                long startTime = System.nanoTime();
                for (int count = 0 ; count < times ; ++count) {
                        try {
                                try {
                                        throw new EmptyException();
                                } catch (EmptyException exc) {
                                        if (!should_catch) {
                                                throw exc;
                                        }
                                }
                        } catch (EmptyException exc) {
                                // ...
                        }
                }
                long endTime = System.nanoTime();
                return endTime - startTime;
        }

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

                // Warm-Up:
                loop(1000);

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