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 { /** * For a string containing an unsigned number as judged by * <code>isUnsignedNumber()</code>, return the numerical value, rounded to * an integer. * * @return the numeric value, rounded to an integer, or 0 * if the string is not a valid unsigned number. */ public static int getUnsignedNumber(String string) { String s = string.trim(); if (!isUnsignedNumber(s)) return 0; double value = 0; try { value = Double.parseDouble(s); } catch (NumberFormatException e) { //logger.warn("Unexpected number value `" + s + "'"); } return (int) Math.round(value); } /** * Tell whether the string contains an unsigned number. */ public static boolean isUnsignedNumber(String string) { String s = string.trim(); if (s.length() < 1) return false; if (s.charAt(0) != '+' && s.charAt(0) != '-') { double value = 0; try { value = Double.parseDouble(s); } catch (NumberFormatException e) { return false; } return true; } return false; } }