Mega Code Archive
Class for program event timing
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/*
* This code is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
//package no.geosoft.cc.util;
import java.util.Date;
/**
* Class for program event timing.
* Usage:
*
* <pre>
* Timer timer = new Timer();
*
* // do stuff
*
* System.out.println (timer); // prints time elapsed since
* // object was created.
* </pre>
*
* @author <a href="mailto:jacob.dreyer@geosoft.no">Jacob Dreyer</a>
*/
public class Timer
{
private Date start_;
/**
* Start timer.
*/
public Timer()
{
reset();
}
/**
* Returns exact number of milliseconds since timer was started.
*
* @return Number of milliseconds since timer was started.
*/
public long getTime()
{
Date now = new Date();
long nMillis = now.getTime() - start_.getTime();
return nMillis;
}
/**
* Restarts the timer.
*/
public void reset()
{
start_ = new Date(); // now
}
/**
* Returns a formatted string showing the elaspsed time
* suince the instance was created.
*
* @return Formatted time string.
*/
public String toString()
{
long nMillis = getTime();
long nHours = nMillis / 1000 / 60 / 60;
nMillis -= nHours * 1000 * 60 * 60;
long nMinutes = nMillis / 1000 / 60;
nMillis -= nMinutes * 1000 * 60;
long nSeconds = nMillis / 1000;
nMillis -= nSeconds * 1000;
StringBuffer time = new StringBuffer();
if (nHours > 0) time.append (nHours + ":");
if (nHours > 0 && nMinutes < 10) time.append ("0");
time.append (nMinutes + ":");
if (nSeconds < 10) time.append ("0");
time.append (nSeconds);
time.append (".");
if (nMillis < 100) time.append ("0");
if (nMillis < 10) time.append ("0");
time.append (nMillis);
return time.toString();
}
/**
* Testing this class.
*
* @param args Not used.
*/
public static void main (String[] args)
{
Timer timer = new Timer();
for (int i = 0; i < 100000000; i++) {
double b = 998.43678;
double c = Math.sqrt (b);
}
System.out.println (timer);
}
}
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