src/main/java/org/jboss/util/StopWatch.java
public long stop()
   {
      long lap = 0;

      if (running) {
         count++;
         stop = System.currentTimeMillis();
         lap = stop - start;
         total += lap;
         running = false;
      }

      return lap;
   }
public long stop()
   {
      long lap = 0;

      if (running) {
         count++;
         stop = System.currentTimeMillis();
         lap = stop - start;
         total += lap;
         running = false;
      }

      return lap;
   }
Stop the watch.

@return  Elapsed time or 0 if the watch was never started.