The Android Support Library Collection of the Java Class Library Renewal and feature introduction ava class libraries)

Android Support Library Collections is a framework in the Android support library for processing set data.This framework provides a set of powerful and flexible tools that can simplify the process of using a collection in Android applications. The version update and characteristics of Android SUPPORT LIBRARY Collections are as follows: 1. Edition update: -Everages 1.0.0: Initial version.Provide basic collection operation functions, such as adding, deleting, finding and sorting. -D version 1.1.0: Introduce new collection types, such as stacks (stack) and queue, and methods to find maximum and minimum values in the collection. -D version 1.2.0: Added types that support concurrency operations, such as synchronous queueue and blockingQueue, and how to find elements in the collection. -Edition 1.3.0: Introduce new collection types such as linkedlist and doublinkedlist, as well as methods to insert and delete elements in the collection. 2. Feature introduction: -The collection type: Android support library collection provides a variety of collection types, including lists, sets (sets), mapping (MAP), etc.Developers can choose proper collection types according to their needs to store and process data. -Cache operation: This framework provides a wealth of collection operations, such as adding elements, deleting elements, finding elements, sorting, etc.Developers can operate various operations by calling these methods. -Capy support: Android Support Library Collections also introduced some types of sets that support concurrency operations, such as step queues and blocking queues.These collection types can securely process data in a multi -threaded environment to ensure the consistency and thread security of the data. -Linkage operation: In addition to the traditional collection type, the framework also provides new collection types such as linked lists and two -way linked lists.These types can be used to quickly insert and delete elements, suitable for scenes that need to modify the collection frequently. Here are some Java code examples using Android support library collections: // Create a list List<String> list = new ArrayList<>(); list.add("apple"); list.add("banana"); list.add("orange"); // Elements in the traversal list for (String item : list) { System.out.println(item); } // Create a set Set<Integer> set = new HashSet<>(); set.add(1); set.add(2); set.add(3); // Check whether there is an element in the concentration boolean contains = set.contains(2); System.out.println("Set contains 2: " + contains); // Create a mapping Map<String, Integer> map = new HashMap<>(); map.put("apple", 1); map.put("banana", 2); map.put("orange", 3); // Get all the keys in the mapping Set<String> keys = map.keySet(); for (String key : keys) { System.out.println("Key: " + key + ", Value: " + map.get(key)); } By using Android Support Library Collections framework, developers can easily process the collection data and select appropriate collection types and operation methods to meet the needs of the application.