ThreadPoolExecutor 线程池的七大参数

最新推荐文章于 2025-10-29 10:53:21 发布

原创最新推荐文章于 2025-10-29 10:53:21 发布 · 249 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#java #队列 #多线程

Java 专栏收录该内容

25 篇文章

订阅专栏

本文详细解析了线程池构造函数中的七个关键参数：corePoolSize、maximumPoolSize、keepAliveTime、unit、workQueue、threadFactory 和 handler 的含义及作用。

源码

 public ThreadPoolExecutor(int corePoolSize,
                              int maximumPoolSize,
                              long keepAliveTime,
                              TimeUnit unit,
                              BlockingQueue<Runnable> workQueue,
                              ThreadFactory threadFactory,
                              RejectedExecutionHandler handler) {
        if (corePoolSize < 0 ||
            maximumPoolSize <= 0 ||
            maximumPoolSize < corePoolSize ||
            keepAliveTime < 0)
            throw new IllegalArgumentException();
        if (workQueue == null || threadFactory == null || handler == null)
            throw new NullPointerException();
        this.acc = System.getSecurityManager() == null ?
                null :
                AccessController.getContext();
        this.corePoolSize = corePoolSize;
        this.maximumPoolSize = maximumPoolSize;
        this.workQueue = workQueue;
        this.keepAliveTime = unit.toNanos(keepAliveTime);
        this.threadFactory = threadFactory;
        this.handler = handler;
    }