Java tutorial
//package com.java2s; /******************************************************************************* * Copyright (c) 2015 Federal Institute for Risk Assessment (BfR), Germany * * 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. * * 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 { public static String getNonNull(Object o) { if (o == null) { return ""; } if (o instanceof Double && (((Double) o).isNaN() || ((Double) o).isNaN())) { return ""; } return o.toString(); } }