java - Java 的秒表类

Question

您应该使用哪个 Java 类来测量时间性能？

(可以使用任何日期/时间类，但我要问的原因是在 .Net 中有一个指定的 Stopwatch 类用于此目的)

Answer 1

Spring 框架具有出色的 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());

这会产生:

    StopWatch 'My Stop Watch': running time (millis) = 10000    -----------------------------------------    ms     %     Task name    -----------------------------------------    02000  020%  initializing    05000  050%  processing    03000  030%  finalizing