Package cern.colt

Class Timer

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Cloneable
    public class Timer
extends PersistentObject
    A handy stopwatch for benchmarking. Like a real stop watch used on ancient running tracks you can start the watch, stop it, start it again, stop it again, display the elapsed time and reset the watch.
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      Timer()
      Constructs a new timer, initially not started.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      Timer display()
      Prints the elapsed time on System.out
      float elapsedTime()
      Same as seconds().
      long millis()
      Returns the elapsed time in milli seconds; does not stop the timer, if started.
      Timer minus​(Timer other)
      T = this - other; Constructs and returns a new timer which is the difference of the receiver and the other timer.
      float minutes()
      Returns the elapsed time in minutes; does not stop the timer, if started.
      Timer plus​(Timer other)
      T = this + other; Constructs and returns a new timer which is the sum of the receiver and the other timer.
      Timer reset()
      Resets the timer.
      float seconds()
      Returns the elapsed time in seconds; does not stop the timer, if started.
      Timer start()
      Starts the timer.
      Timer stop()
      Stops the timer.
      static void test​(int size)
      Shows how to use a timer in convenient ways.
      java.lang.String toString()
      Returns a String representation of the receiver.

      • Methods inherited from class java.lang.Object

        equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Field Detail

      • baseTime

        private long baseTime

      • elapsedTime

        private long elapsedTime

    • Constructor Detail

      • Timer

        public Timer()
        Constructs a new timer, initially not started. Use start() to start the timer.

    • Method Detail

      • display

        public Timer display()
        Prints the elapsed time on System.out
        Returns:
        this (for convenience only).

      • elapsedTime

        public float elapsedTime()
        Same as seconds().

      • millis

        public long millis()
        Returns the elapsed time in milli seconds; does not stop the timer, if started.

      • minus

        public Timer minus​(Timer other)
        T = this - other; Constructs and returns a new timer which is the difference of the receiver and the other timer. The new timer is not started.
        Parameters:
        other - the timer to subtract.
        Returns:
        a new timer.

      • minutes

        public float minutes()
        Returns the elapsed time in minutes; does not stop the timer, if started.

      • plus

        public Timer plus​(Timer other)
        T = this + other; Constructs and returns a new timer which is the sum of the receiver and the other timer. The new timer is not started.
        Parameters:
        other - the timer to add.
        Returns:
        a new timer.

      • reset

        public Timer reset()
        Resets the timer.
        Returns:
        this (for convenience only).

      • seconds

        public float seconds()
        Returns the elapsed time in seconds; does not stop the timer, if started.

      • start

        public Timer start()
        Starts the timer.
        Returns:
        this (for convenience only).

      • stop

        public Timer stop()
        Stops the timer. You can start it again later, if necessary.
        Returns:
        this (for convenience only).

      • test

        public static void test​(int size)
        Shows how to use a timer in convenient ways.

      • toString

        public java.lang.String toString()
        Returns a String representation of the receiver.
        Overrides:
        toString in class java.lang.Object