Article:		Timing is Everything
Subject:		System.currentTimeMillis() and changed system clock
Date:		2005-02-25 12:27:54
From:		whome
System.currentTimeMillis() method is evil if you use it for interval and/or duration calculations. Imagine if user changes system clock at runtime, or daylight saving. curTime = System.currentTimeMillis(); if (curTime > prevTime + 2000) { // now, think what happens if user // moved system clock 1h backward } prevTime = curTime;