Java tutorial
//package com.java2s; /* * Copyright (c) 2016, marlonlom * * 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. */ import java.util.Calendar; import java.util.List; public class Main { /** * Add date time with one day. * * @param listing the listing * @param currentTime the current time * @param isPast true/false if past time */ private static void addDateTimeWithOneDay(final List<Long> listing, final long currentTime, final boolean isPast) { final Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(currentTime); calendar.add(Calendar.DAY_OF_MONTH, isPast ? -1 : 1); listing.add(calendar.getTimeInMillis()); } }