Here you can find the source of startWith(String string, String prefix)
public static String startWith(String string, String prefix)
//package com.java2s; /**/*from w w w. j a v a 2 s.co m*/ * Copyright 2010 Molindo GmbH * * 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 { public static String startWith(String string, String prefix) { if (empty(string)) { return prefix; } else if (string.startsWith(prefix)) { return string; } else { return prefix + string; } } public static boolean empty(String string) { return string == null || string.isEmpty(); } }