001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017package org.apache.logging.log4j.core.helpers; 018 019/** 020 * Helps deal with integers. 021 */ 022public class Integers { 023 024 /** 025 * Parses the string argument as a signed decimal integer. 026 * 027 * @param s 028 * a {@code String} containing the {@code int} representation to parse, may be {@code null} or {@code ""} 029 * @param defaultValue 030 * the return value, use {@code defaultValue} if {@code s} is {@code null} or {@code ""} 031 * @return the integer value represented by the argument in decimal. 032 * @throws NumberFormatException 033 * if the string does not contain a parsable integer. 034 */ 035 public static int parseInt(String s, int defaultValue) { 036 return Strings.isEmpty(s) ? defaultValue : Integer.parseInt(s); 037 } 038 039 /** 040 * Parses the string argument as a signed decimal integer. 041 * 042 * @param s 043 * a {@code String} containing the {@code int} representation to parse, may be {@code null} or {@code ""} 044 * @return the integer value represented by the argument in decimal. 045 * @throws NumberFormatException 046 * if the string does not contain a parsable integer. 047 */ 048 public static int parseInt(String s) { 049 return parseInt(s, 0); 050 } 051}