Write code to Remove given char if it post-fixes the given string
/* * Copyright 2013 Kay Stenschke//from ww w .j av a 2s . c om * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ //package com.book2s; public class Main { public static void main(String[] argv) { String sourceStr = "book2s.com"; String trailChar = "com"; System.out.println(removePostfixChar(sourceStr, trailChar)); } /** * Remove given char if it post-fixes the given string * * @param sourceStr * @param trailChar * @param trailMustExist true: if trail isn't the given one: return null / otherwise return as is * @return String */ private static String removePostfixChar(String sourceStr, String trailChar, Boolean trailMustExist) { if (sourceStr != null && sourceStr.lastIndexOf(trailChar) == sourceStr.length() - 1) { return sourceStr.substring(0, sourceStr.length() - 1); } return trailMustExist ? null : sourceStr; } private static String removePostfixChar(String sourceStr, String trailChar) { return removePostfixChar(sourceStr, trailChar, true); } }