Java tutorial
//package com.java2s; /* * Copyright (C) 2009 Teleca Poland Sp. z o.o. <android@teleca.com> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { public static int getTimeLeftFromNow(String time) { long target = 0; try { target = Long.parseLong(time); } catch (NumberFormatException e) { return 0; } long current = System.currentTimeMillis() / 1000; return (int) ((target - current) / 60 / 60 / 24 + 1); } }