StopWatch reports elapsed time between start and stop : StopWatch « Development Class « Java
StopWatch reports elapsed time between start and stop
/*
* Copyright 2003-2004 Michael Franken, Zilverline.
*
* The contents of this file, or the files included with this file, are subject to
* the current version of ZILVERLINE Collaborative Source License for the
* Zilverline Search Engine (the "License"); You may not use this file except in
* compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.zilverline.org.
*
* See the License for the rights, obligations and
* limitations governing use of the contents of the file.
*
* The Original and Upgraded Code is the Zilverline Search Engine. The developer of
* the Original and Upgraded Code is Michael Franken. Michael Franken owns the
* copyrights in the portions it created. All Rights Reserved.
*
*/
/**
* StopWatch reports elapsed time between start and stop.
*
* @author Michael Franken
* @version $Revision: 1.12 $
*/
public class StopWatch {
/** Time the Stopwatch started. */
private long start = 0;
/** Time the Stopwatch stopped. */
private long stop = 0;
/**
* Start ticking, resets the watch.
*/
public final void start() {
start = System.currentTimeMillis();
}
/**
* Stop ticking.
*/
public final void stop() {
stop = System.currentTimeMillis();
}
/**
* Calculates time elapsed. If stop has not been called yet, the current time is taken to calculate elapsed time.
*
* @return the time elapsed between start and stop as String. The string contains two of days, hours, minutes, seconds and
* milliseconds.
*
* @throws StopWatchException If StopWatch was never started.
*/
public final String elapsedTime() {
long difference;
if (stop == 0) {
long now = System.currentTimeMillis();
difference = (now - start); // in millis
} else {
difference = (stop - start); // in millis
}
long mils = difference % 1000;
difference = (difference - mils) / 1000; // in seconds
long secs = difference % 60;
difference = (difference - secs) / 60; // in minutes
long minutes = difference % 60;
difference = (difference - minutes) / 60; // in hours
long hours = difference % 24;
difference = (difference - hours) / 24; // in days
long days = difference;
String message = "";
if (days > 0) {
message = days + " days and " + hours + " hours";
} else if (hours > 0) {
message = hours + " hours and " + minutes + " minutes";
} else if (minutes > 0) {
message = minutes + " minutes and " + secs + " seconds";
} else if (secs > 0) {
message = secs + " seconds and " + mils + " milliseconds";
} else {
message = mils + " milliseconds";
}
return message;
}
}
