Which Java class should you use for time performance measurements?
(One could use any date/time class, but the reason I'm asking is in .Net there's a designated Stopwatch class for this purpose)
The Spring Framework has an excellent StopWatch
class:
StopWatch stopWatch = new StopWatch("My Stop Watch");
stopWatch.start("initializing");
Thread.sleep(2000); // simulated work
stopWatch.stop();
stopWatch.start("processing");
Thread.sleep(5000); // simulated work
stopWatch.stop();
stopWatch.start("finalizing");
Thread.sleep(3000); // simulated work
stopWatch.stop();
System.out.println(stopWatch.prettyPrint());
This produces:
StopWatch 'My Stop Watch': running time (millis) = 10000 ----------------------------------------- ms % Task name ----------------------------------------- 02000 020% initializing 05000 050% processing 03000 030% finalizing