Here you can find the source of splitPackageName(String packageName)
private static List<String> splitPackageName(String packageName)
//package com.java2s; /*/*w ww . jav a 2s . com*/ * Copyright (C) 2016 Google Inc. * * 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. */ import java.util.ArrayList; import java.util.List; public class Main { private static List<String> splitPackageName(String packageName) { // e.g. given com.example.appname.library.widgetname // returns com // com.example // com.example.appname // etc. List<String> result = new ArrayList<>(); int end = packageName.indexOf('.'); while (end > 0) { result.add(packageName.substring(0, end)); end = packageName.indexOf('.', end + 1); } result.add(packageName); return result; } }