然后会监测 ExecutorService 是否已经关闭,返回true(shutdown请求后所有任务执行完毕)或false(已超时) 二、区别 1、shutdown() 和 shutdownNow() 的区别 shutdownNow()能立即停止线程池,正在跑的和正在等待的任务都停下了。 shutdown()只是关闭了提交通道,用submit()是无效的;而内部该怎
shutdown(): Executor创建时处于运行状态。当调用ExecutorService.shutdown()后,线程池就会关闭,拒绝新提交的任务, 终止前允许执行以前提交的任务,包括队列中的任务。 shutdownNow():会将线程池关闭,拒绝新提交的任务,对于正在运行的线程进行打断,阻塞的队列中任务也会打断。这里会返回所有没有开始的任务。 isShutdow...
以ExecutorService的实现类ThreadPoolExecutor为例,看下关于线程池管理方法的实原理: 注意shutdown shutdownnow方法均不是阻塞的,仅仅完成状态的设置,不会等待任务执行完毕。 1.shutdown:调用该方法后会拒绝接收新任务。 public void shutdown() { final ReentrantLock mainLock = this.mainLock; mainLock.lock(); t...
SecurityException- if a security manager exists and shutting down this ExecutorService may manipulate threads that the caller is not permitted to modify because it does not holdRuntimePermission("modifyThread"), or the security manager'scheckAccessmethod denies access. 我搜索了之后,发现国外有个老哥实现...
import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.Future;/ Callable 和 Future接口 Callable是类似于Runnable的接口,实现Callable接口的类和实现Runnable的类都是可被其它线程执行的任务。Callable和Runnable有几点不同:(1)Callable规定的方法是call(...
问Java ExecutorService ShutdownNow历久弥新EN初始化一个有序的关闭，之前提交的任务都会被执行，但是新...
AbstractExecutorService Konstruktoren Eigenschaften Methoden AwaitTermination AwaitTerminationAsync Ausführen InvokeAll InvokeAny NewTaskFor Herunterfahren ShutdownNow Übermitteln ArrayBlockingQueue BrokenBarrierException CancellationException CompletableFuture ...
executorService.shutdown(); 输出截图(执行完了,才优雅的终止): 接着改造代码,调用 shutdownNow 方法来关闭线程池,代码如下。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 //4. 调用 ExcutorService 对象的 shutdownNow 方法来关闭线程池。List<Runnable>tasks=executorService.shutdownNow();System.out....
voidshutdownAndAwaitTermination(ExecutorServicepool){// Disable new tasks from being submittedpool.shutdown();try{// Wait a while for existing tasks to terminateif(!pool.awaitTermination(60,TimeUnit.SECONDS)){// Cancel currently executing tasks forcefullypool.shutdownNow();// Wait a while for ...
void shutdownAndAwaitTermination(ExecutorService pool) { pool.shutdown(); // Disable new tasks from being submitted try { // Wait a while for existing tasks to terminate if (!pool.awaitTermination(60, TimeUnit.SECONDS)) { pool.shutdownNow(); // Cancel currently executing tasks // Wait a...