In case of exceptional completion with a CompletionException, methods get() and get(long,java.util.concurrent.TimeUnit) throw an ExecutionException with the same cause as held in the corresponding CompletionException. To simplify usage in most contexts, this class also defines methods join() and ...
CompletableFuture class in Java which implementsFutureinterface andCompletionStageinterface tries to address these issues. This class provides methods likerunAsync()andsupplyAsync()that run a task asynchronously. But the biggest advantage of CompletableFuture class in Java isits ability to run a task as ...
publicclassCompletableFutureAPI4Demo{publicstaticvoidmain(String[] args){ CompletableFuture.supplyAsync(() -> {return1; }).thenApply(f -> {returnf +2; }).thenApply(f -> {returnf +3; }).thenAccept(r -> { System.out.println(r); }); } } thenAccept() 和 thenApply() 都是 Java 中 ...
import java.util.concurrent.CancellationException;import java.util.concurrent.CompletionException;import java.util.concurrent.CompletionStage;import java.util.concurrent.locks.LockSupport;public class CompletableFuture<T> implements Future<T>, CompletionStage<T> { volatile Object result; // Either the result ...
in runnable demo in main Join会阻塞当前线程,一直等待自定义线程才返回。 二、实现Callable接口 在Runnable的例子中,Runnable接口有一个很大的缺陷就是run方法没有返回值定义,主线程无法获取到线程执行的结果。这个时候就需要Callable接口。 publicclassCallableDemoimplementsCallable<CallableDto>{publicCallableDtocall()...
java.lang.Object java.util.concurrent.CompletableFuture<T> All Implemented Interfaces: CompletionStage<T>, Future<T> public class CompletableFuture<T> extends Object implements Future<T>, CompletionStage<T> A Future that may be explicitly completed (setting its value and status), and may be used ...
CompletableFuture ClassReference Feedback DefinitionNamespace: Java.Util.Concurrent Assembly: Mono.Android.dll A Future that may be explicitly completed (setting its value and status), and may be used as a CompletionStage, supporting dependent functions and actions that trigger upon its completion....
代码语言:java 复制 publicclassCompletableFutureUserDemo{publicstaticvoidmain(String[]args)throwsExecutionException,InterruptedException{CompletableFuture<Integer>completableFuture=CompletableFuture.supplyAsync(()->{System.out.println(Thread.currentThread().getName()+"---come in");intresult=ThreadLocalRandom.curr...
Future接口在Java5中被引入,设计初衷是对将来某个时刻会发生的结果进行建模。它建模了一种异步计算,返回一个执行运算结果的引用,当运算结束后,这个引用被返回给调用方。在Future中触发那些潜在耗时的操作把调用线程解放出来,让调用线程能继续执行其他有价值的工作,不再需要呆呆等待耗时的操作完成。
CompletableFuture ClassReference Feedback DefinitionNamespace: Java.Util.Concurrent Assembly: Mono.Android.dll A Future that may be explicitly completed (setting its value and status), and may be used as a CompletionStage, supporting dependent functions and actions that trigger upon its completion....