Here you can find the source of sleep(int sec)
static void sleep(int sec) throws Exception
//package com.java2s; /*/* w w w . j a va 2 s . c o m*/ * $Id$ * * Copyright (C) 2003-2015 JNode.org * * This library 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 library 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 library; If not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ public class Main { static final int UNIT_TIME = 1000; static void sleep(int sec) throws Exception { Thread.sleep(sec * UNIT_TIME); } }