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

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
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