Here you can find the source of millisSince(long from)
public static long millisSince(long from)
//package com.java2s; /*/*from ww w.ja v a 2 s . c om*/ Copywrite 2012 Will Winder This file is part of Universal Gcode Sender (UGS). UGS is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. UGS 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 General Public License for more details. You should have received a copy of the GNU General Public License along with UGS. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static long millisSince(long from) { long until = System.currentTimeMillis(); return until - from; } }