Here you can find the source of timeToFromNow(long time)
public static int timeToFromNow(long time)
//package com.java2s; /*// w w w . j a va 2s. c om * Copyright (c) 2010-2012 Sonatype, Inc. All rights reserved. * * This program is licensed to you under the Apache License Version 2.0, * and you may not use this file except in compliance with the Apache License Version 2.0. * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0. * * Unless required by applicable law or agreed to in writing, * software distributed under the Apache License Version 2.0 is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under. */ public class Main { public static int timeToFromNow(long time) { long maxAgeMillis = time - System.currentTimeMillis(); return (int) (maxAgeMillis / 1000) + (maxAgeMillis % 1000 != 0 ? 1 : 0); } }