Here you can find the source of quote(String s, char ch)
private static String quote(String s, char ch)
//package com.java2s; /*/*from www . j a v a 2s .c o m*/ * Copyright 2000-2013 JetBrains s.r.o. * * 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. */ public class Main { private static String quote(String s, char ch) { return !isQuoted(s, ch) ? ch + s + ch : s; } private static boolean isQuoted(String s, char ch) { return s.length() >= 2 && s.charAt(0) == ch && s.charAt(s.length() - 1) == ch; } }