java如何调用自定义线程池

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要调用自定义线程池，首先需要定义一个自定义的线程池类，继承自 java.util.concurrent.ThreadPoolExecutor 类。然后在自定义的线程池类中重写构造方法，设置线程池的核心线程数、最大线程数、线程空闲时间、任务队列等参数。

接下来可以通过创建一个实例化自定义线程池类，并调用 execute() 方法来提交任务给线程池执行。例如：

public class CustomThreadPool extends ThreadPoolExecutor {public CustomThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue) {super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue);
    }

    public static void main(String[] args) {CustomThreadPool customThreadPool = new CustomThreadPool(5, 10, 60L, TimeUnit.SECONDS, new LinkedBlockingQueue<>());

        for (int i = 0; i < 10; i++) {customThreadPool.execute(new MyTask(i));
        }

        customThreadPool.shutdown();}

    static class MyTask implements Runnable {private int taskId;

        public MyTask(int taskId) {this.taskId = taskId;
        }

        @Override
        public void run() {System.out.println("Task " + taskId + " is running on thread " + Thread.currentThread().getName());
        }
    }
}