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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 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()); } } }
在上面的例子中,我们创建了一个CustomThreadPool类,重写了构造方法并定义了一个main()方法来使用自定义线程池。我们提交了10个任务给线程池执行,并最后调用shutdown()方法来关闭线程池。