cern.colt
Class Timer

java.lang.Object
  cern.colt.Timer

public class Timer
extends Object

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.

Author:

wolfgang.hoschek@cern.ch, Piotr Wendykier (piotr.wendykier@gmail.com)

Constructor Summary

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

Method Summary

Timer	display() Prints the elapsed time on System.out
double	elapsedTime() Same as seconds().
double	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.
double	minutes() Returns the elapsed time in minutes; does not stop the timer, if started.
long	nanos() Returns the elapsed time in nano seconds; 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.
double	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.
String	toString() Returns a String representation of the receiver.

Methods inherited from class java.lang.Object

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

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 double elapsedTime()

Same as seconds().

millis

public double millis()

Returns the elapsed time in milli seconds; does not stop the timer, if started.

nanos

public long nanos()

Returns the elapsed time in nano 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 double 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 double 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 String toString()

Returns a String representation of the receiver.

Overrides:

toString in class Object