Here you can find the source of nanoToSec(Long n)
public static int nanoToSec(Long n)
//package com.java2s; /*/* www .ja va2 s.co m*/ LionChat Server/Client library program Copyright (C) 2013 Enrico Fasoli This program 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 2 of the License, or (at your option) any later version. This program 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. */ public class Main { public static int nanoToSec(Long n) { //fa una semplice divisione: da nanoscondi a secondi, passando da Long a Int return (int) (n / 1000000000); } }