What is inheritance of classes in Java thread pool?
- PHPzforward
- 2023-05-09 10:55:07669browse
1. Description
The core implementation class of the thread pool in Java is ThreadPoolExecutor
Executor: only provides an interface for executing tasks, and users do not need to pay attention to how to create threads. How to make a thread, just provide a Runnable object.
ExecutorService: On the basis of task execution, interfaces such as task submission and thread pool life cycle management are added.
AbstractExecutorService: The process of abstract series execution tasks, ensuring that the implementation of the lower layer only needs to focus on the method of executing tasks.
ThreadPoolexecutor: On the one hand, it maintains its own life cycle, and on the other hand, it manages courses and tasks. The two are well combined to implement parallel tasks.
2. Example
// ctl：高三位表示线程池运行状态，低29位表示线程池线程运行数量
// 一个变量存储两个值的好处是不必费心思（比如加锁）去维护两个状态的一致性
private final AtomicInteger ctl = new AtomicInteger(ctlOf(RUNNING, 0));
// 获取线程池当前的运行状态（～：按位取反，即0变成1，1变成0。）
private static int runStateOf(int c) { return c & ~CAPACITY; }
// 获取线程池当前运行的线程数量
private static int workerCountOf(int c) { return c & CAPACITY; }
// 通过线程池状态和运行的线程数量获取ctl
private static int ctlOf(int rs, int wc) { return rs | wc; }The above is the detailed content of What is inheritance of classes in Java thread pool?. For more information, please follow other related articles on the PHP Chinese website!