AI代码解释 importjava.util.concurrent.*;publicclassExecutorServiceFutureDemo{publicstaticvoidmain(String[]args)throws ExecutionException,InterruptedException{ExecutorService executor=Executors.newFixedThreadPool(1);Future<Integer>future=executor.submit(()->{Thread.sleep(2000);// 模拟耗时操作return42;// 计算结...
ExecutorService是java.util.concurrent包下的接口,它是线程池的主接口,提供了执行任务的高级接口。通过它,我们可以提交任务(Runnable或Callable类型)到线程池中执行,而无需关心线程的创建、调度和销毁等细节。 常见实现类 ThreadPoolExecutor:最常用的线程池实现,提供了高度可配置的线程池参数,如核心线程数、最大线程数...
过去,Java 并发编程包括通过 java.lang.Thread 类和 java.lang.Runnable 接口编写线程,然后确保其代码以正确、一致的方式对共享可变对象进行操作并避免错误的读/写操作,同时不会产生由于锁争用条件所导致的死锁。以下是基本线程操作的示例: Thread thread = new Thread() { @Override public void run() { System....
在实际应用中,通常会使用ExecutorService而不是Executor,因为ExecutorService提供了更多的功能和更好的性能。 使用Executor 下面代码是Executor来执行一个线程,如下: 使用ExecutorService 下面代码是ExecutorService 来执行一个线程,如下: import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public...
java.util.concurrent.ThreadPoolExecutor文件开头: privatefinalAtomicInteger ctl =newAtomicInteger(ctlOf(RUNNING, 0));privatestaticfinalintCOUNT_BITS = Integer.SIZE - 3;privatestaticfinalintCAPACITY = (1 << COUNT_BITS) - 1;//runState is stored in the high-order bitsprivatestaticfinalintRUNNING = ...
Methods inherited from interface java.util.concurrent.Executor execute Method Detail shutdown void shutdown() Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted. Invocation has no additional effect if already shut down. ...
Executor 和 ExecutorService 接口第四个区别是除了允许客户端提交一个任务,ExecutorService 还提供用来控制线程池的方法。比如:调用 shutDown() 方法终止线程池。可以通过 《Java Concurrency in Practice》 一书了解更多关于关闭线程池和如何处理 pending 的任务的知识。
Uses of ExecutorService in java.util.concurrent Subinterfaces of ExecutorService in java.util.concurrent Modifier and TypeInterface and Description interface ScheduledExecutorService An ExecutorService that can schedule commands to run after a given delay, or to execute periodically. Classes in java.util...
Executes the given command at some time in the future. (Inherited from IExecutor) Finalized() Called when the instance has been finalized. (Inherited from IJavaPeerable) InvokeAll(ICollection, Int64, TimeUnit) Executes the given tasks, returning a list of Futures holding their status...
java自带的ScheduledExecutorService定时任务正常执行一?400报错目前我有用java自带的ScheduledExecutorService线程...