The purpose and characteristics of the ConcurrentlinkedhashMap framework in the Java class library

ConcurrentlinkedhashMap (Clhm) is a Java library that provides an efficient concurrent hash mapping framework, which is suitable for data cache and storage in high -concurrency environment.Clhm uses a linked list -based hash table implementation method, which can maintain high performance in high concurrency conditions, and provide thread security operations in a multi -threaded environment. The main features of the ConcurrentlinkedhashMap framework include: 1. High -combined hair performance: Clhm uses a linked list -based hash table implementation method, which can maintain high performance in high concurrency conditions, suitable for large -scale concurrent access scenes. 2. LRU cache elimination strategy: Clhm supports the cache elimination strategy based on LRU (recently used), which can automatically eliminate data that has not been used for a long time, thereby maintaining the effective use of cache space. 3. Thread security: CLHM considers the security in multi -threaded environment in design, which can ensure data consistency and thread security in multi -threaded environments. 4. Ejaculation: The design of the ClHM framework considers the scene of concurrent access, which can better cope with the situation of large -scale concurrent access, and has good ejaculation. The use of the ClHM framework mainly includes but not limited to: 1. Data cache: In high concurrency network services, CLHM can be used to achieve data cache, improve access performance, and reduce the pressure of rear storage. 2. Data storage: CLHM can be used as a storage container for data, which can well cope with the situation of multi -threaded concurrent access. 3. Distributed computing: In a distributed computing system, ClHM can be implemented as the underlying layer of a distributed cache to store the calculation results and temporary data. Example code: import com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap; import java.util.Map; public class ConcurrentLinkedHashMapExample { public static void main(String[] args) { // Create a ClHM instance with a maximum capacity of 100 Map<Integer, String> cache = new ConcurrentLinkedHashMap.Builder<Integer, String>() .maximumWeightedCapacity(100) .build(); // Storage data from clhm cache.put(1, "value1"); cache.put(2, "value2"); cache.put(3, "value3"); // Obtain data from CLHM String value = cache.get(2); System.out.println (value); // Output: value2 } } The above example code demonstrates how to use the ConcurrentlinkedhashMap framework to create a cache instance with a maximum capacity of 100, and perform data storage and obtaining operations.In practical applications, more detailed configuration and use can be performed according to specific needs.