Here you can find the source of getYear(String date)
private static Integer getYear(String date)
//package com.java2s; /******************************************************************************* * Copyright (c) 2016 German Federal Institute for Risk Assessment (BfR) * * 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 3 of the License, or * (at your option) any later version./*from ww w. ja v a 2 s . com*/ * * 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. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Contributors: * Department Biological Safety - BfR *******************************************************************************/ public class Main { private static Integer getYear(String date) { if (date == null) { return null; } String year = null; if (date.contains(".")) { year = date.substring(date.lastIndexOf('.') + 1); } else if (date.contains("-")) { year = date.substring(0, date.indexOf('-')); } else { year = date; } try { return Integer.parseInt(year); } catch (NumberFormatException | NullPointerException e) { return null; } } }