Package ucb.util

Class Stopwatch

  • public class Stopwatch
extends Object
    A simple timer class based on elapsed wall-clock time. May be stopped and started under program control, and provides both accumulated time and time since last started in units of msec. At any given point, a given timer has some number of properly nested subtimers running. While one subtimer is running, you can start and stop another, allowing you to time parts of some larger activity while still computing the time for the entire activity.

    • Constructor Summary

      Constructors 
      Constructor Description
      Stopwatch()
      A stopped timer(! isRunning()) with 0msec accumulated time.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      long getAccum()
      Return the total time in milliseconds that isRunning() has been true since THIS was created or reset.
      long getElapsed()
      Return the time in milliseconds since the latest, still-running subtimer started.
      int getRunning()
      Return the number of nested subtimers currently running.
      boolean isRunning()
      Return true iff there are subtimers of THIS running.
      void reset()
      Stop all subtimers, and set accumulated time to 0.
      void start()
      Start a new subtimer at the current time.
      long stop()
      Stops the most recently started, still-running subtimer, returning the time elapsed since it started in milliseconds.

    • Constructor Detail

      • Stopwatch

        public Stopwatch()
        A stopped timer(! isRunning()) with 0msec accumulated time.

    • Method Detail

      • isRunning

        public boolean isRunning()
        Return true iff there are subtimers of THIS running.

      • getRunning

        public int getRunning()
        Return the number of nested subtimers currently running.

      • start

        public void start()
        Start a new subtimer at the current time.

      • stop

        public long stop()
        Stops the most recently started, still-running subtimer, returning the time elapsed since it started in milliseconds. Throws IllegalStateException if !isRunning().

      • getElapsed

        public long getElapsed()
        Return the time in milliseconds since the latest, still-running subtimer started. Throws IllegalStateException if !isRunning().

      • getAccum

        public long getAccum()
        Return the total time in milliseconds that isRunning() has been true since THIS was created or reset.

      • reset

        public void reset()
        Stop all subtimers, and set accumulated time to 0.