Java tutorial
//package com.java2s; /** * Copyright 2000-2006 DFKI GmbH. * All Rights Reserved. Use is subject to license terms. * <p/> * This file is part of MARY TTS. * <p/> * MARY TTS is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, version 3 of the License. * <p/> * 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 Lesser General Public License for more details. * <p/> * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { /** * From the given throwable or its cause, or cause's cause, etc., * get the first one that has a non-empty message, and return that message. * * @param t * @return the first non-empty message string, or null. */ public static String getFirstMeaningfulMessage(Throwable t) { if (t == null) return null; String m = t.getMessage(); if (m != null && !m.isEmpty()) { return m; } return getFirstMeaningfulMessage(t.getCause()); } }