Class StopWatch

java.lang.Object
net.sf.antcontrib.perf.StopWatch
public class StopWatch extends Object
A stopwatch, useful for 'quick and dirty' performance testing. Typical usage: 
StopWatch sw = new StopWatch();  // automatically starts
// do something here...
sw.stop();
System.out.println(sw.toString());   // print the total
sw.start();  // restart the stopwatch
// do some more things...
sw.stop();
System.out.println(sw.format(sw.elapsed()); // print the time since the last start
System.out.println(sw.toString()); // print the cumulative total

Developed for use with Antelope, migrated to ant-contrib Oct 2003.

Version:
$Revision: 1.4 $
Author:
Dale Anson

  • Constructor Details

    • StopWatch

      public StopWatch()
      Starts the stopwatch.

    • StopWatch

      public StopWatch(String name)
      Starts the stopwatch.
      Parameters:
      name - an identifying name for this StopWatch

  • Method Details

    • start

      public long start()
      Starts/restarts the stopwatch. stop must be called prior to restart.
      Returns:
      the start time, the long returned System.currentTimeMillis().

    • stop

      public long stop()
      Stops the stopwatch.
      Returns:
      the stop time, the long returned System.currentTimeMillis().

    • total

      public long total()
      Total cumulative elapsed time.
      Returns:
      the total time

    • elapsed

      public long elapsed()
      Elapsed time, difference between the last start time and now.
      Returns:
      the elapsed time

    • getName

      public String getName()
      Returns:
      the name of this StopWatch

    • format

      public String format(long ms)
      Formats the given time into decimal seconds.
      Returns:
      the time formatted as mm:ss.ddd

    • toString

      public String toString()
      Returns the total elapsed time of the stopwatch formatted in decimal seconds.
      Overrides:
      toString in class Object
      Returns:
      [name: mm:ss.ddd]

    • main

      public static void main(String[] args)