Here you can find the source of getFormatForTimestamp( final Calendar now, final Calendar timestamp)
private static SimpleDateFormat getFormatForTimestamp( final Calendar now, final Calendar timestamp)
//package com.java2s; /******************************************************************************* * Copyright (C) 2015 Connor Lanigan (email: dev@connorlanigan.com) * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. *******************************************************************************/ import java.text.SimpleDateFormat; import java.util.Calendar; public class Main { private static SimpleDateFormat getFormatForTimestamp( final Calendar now, final Calendar timestamp) { if (now.get(Calendar.YEAR) != timestamp.get(Calendar.YEAR)) { return new SimpleDateFormat("yyyy-MM-dd\nHH:mm"); }/*from w w w. j ava2 s. com*/ if (now.get(Calendar.DAY_OF_YEAR) != timestamp .get(Calendar.DAY_OF_YEAR)) { return new SimpleDateFormat("MM-yy\nHH:mm"); } return new SimpleDateFormat("HH:mm"); } }