publicclassCallableAndFuture{publicstaticvoidmain(String[]args){Callable<Integer>callable=newCallable<Integer>(){publicIntegercall()throws Exception{returnnewRandom().nextInt(100);}};FutureTask<Integer>future=ne
packagecom.bjsxt.test;importjava.util.concurrent.Callable;importjava.util.concurrent.ExecutorService;importjava.util.concurrent.Executors;importjava.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。 * Callabl...
Callable<String> callable = new MyCallable(); for(int i=0; i< 100; i++){ //submit Callable tasks to be executed by thread pool Future<String> future = executor.submit(callable); //add Future to the list, we can get return value using Future list.add(future); } for(Future<String...
publicclassCallableExample{publicstaticvoidmain(String[] args)throwsInterruptedException, ExecutionException{ExecutorService executorService = Executors.newSingleThreadExecutor();Callable<String> callable = () -> {Thread.sleep(5000);return"Hello from Callable";};Future<String> future = executorService.submit(...
Callable接口是一个返回结果并且可能抛出异常的任务。它是Runnable接口的一个替代者,因为Runnable接口的run方法不能返回结果或者抛出异常。 下面是一个使用Future和Callable的例子: importjava.util.concurrent.*;publicclassFutureAndCallableExample{publicstaticvoidmain(String[] args)throwsExecutionException, InterruptedExcept...
2. Java Callable Future Example In this example, we are executing a task that returns its name when it’s completed. We will useExecutorServiceto execute this task and print its name inmainthread after it has been completed. TheFuture.get()is used for blocking the main thread execution unti...
Callable 接口的定义如下：public interface Callable<V> { V call() throws Exception; }Future: ...
而这时候，Callable、Future 和 FutureTask 就发挥了它们独特的优势。它们是Java提供的高级并发工具，使得多线程编程变得更加灵活、强大。接下来，我们一一来看这三个概念。Callable：一个更加强大的任务接口 1、什么是Callable？在Java中，Callable 接口是 java.util.concurrent 包下的一个接口，它和 Runnable 很相似，...
FutureTask是Future的一个具体实现,它同样实现了Runnable,因此它既可以由Thread对象执行,也可以提交给ExecutorService。 importjava.util.concurrent.FutureTask;publicclassFutureTaskExample{publicstaticvoidmain(Stringargs){Callable<String>callable=newWordCallable();FutureTask<String>task=newFutureTask<>(callable);newThread...
Callable、Future、FutureTask组合使用可以阻塞获取多线程执行的返回值,是Runnable功能的拓展。 1. 原生使用 代码语言:javascript 代码运行次数:0 运行 AI代码解释 public class CallAbleTest { public static void main(String[] args) throws ExecutionException, InterruptedException { FutureTask futureTask = new FutureTa...