Write code to Return a double-quoted String if the said String contains white-space.
/* * Copyright 2013 Kay Stenschke/* w w w.jav a 2 s. 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 string = "b oo k2s.com"; System.out.println(doubleQuoteIfNecessary(string)); } /** * Returns a double-quoted {@link String} if the said {@link String} * contains white-space. * * @param string the {@link String} to be double-quoted * * @return the double-quoted {@link String} (if required) */ public static String doubleQuoteIfNecessary(String string) { return string != null && string.contains(" ") && !string.startsWith("\"") && !string.endsWith("\"") ? "\"" + string + "\"" : string; } }