在上面的示例中,我们创建了两个线程并启动它们,然后通过join方法等待这两个线程执行完毕。在线程执行完成后,将打印出"All threads have finished execution."。 流程图 StartCreate threadsStart threadsWait for threads to finishPrint messageEnd 总结 通过使用Java的join方法,我们可以方便地监控线程是否执行结束。这种方法适用于需要等待多个线程执行完毕后再继续...
privatestaticvoidthreadJoin(){List<Thread>threads=newArrayList<>();for(int i=0;i<NUM;i++){Thread t=newThread(newPkslowTask("Task "+i));t.start();threads.add(t);}threads.forEach(t->{try{t.join();}catch(InterruptedException e){thrownewRuntimeException(e);}});System.out.println("th...
// 假设我们在服务启动时创建了多个 WorkerThreadWorkerThread[]threads=newWorkerThread[5];for(inti=0;i<threads.length;i++){threads[i]=newWorkerThread();threads[i].start();}Runtime.getRuntime().addShutdownHook(newThread(){publicvoidrun(){WorkerThread.shutDown();// 通知线程完成任务for(Worker...
for (int i = 0; i < N; ++i) // create and start threads new Thread(new Worker(startSignal, doneSignal)).start(); doSomethingElse(); // don't let them run yet startSignal.countDown(); // let all threads proceed doSomethingElse(); doneSignal.await(); // wait for all to fi...
//wait for all tasks to finish } System.out.println("Finished all threads"); } } 运行上面的程序,可以得到下面的输出,由此可以确认任务在10s后才执行。 1 2 3 4 5 6 7 8 Current Time = Tue Oct 29 15:10:03 IST 2013 pool-1-thread-1 Start. Time = Tue Oct 29 15:10:14 IST 2013 ...
("Main thread is starting the worker thread.");workerThread.start();try{System.out.println("Main thread is waiting for the worker thread to finish.");workerThread.join();// Wait for the worker thread to completeSystem.out.println("Worker thread has completed its task.");}catch(...
Learn the different ways to set a custom name for a thread using Thread constructor and setName(). Also, learn to get the name of a thread. Java – Waiting for Running Threads to Finish Learn to make the main thread wait for other threads to finish using the ExecutorService or ThreadPool...
除非调用了prestartAllCoreThreads()或者prestartCoreThread()方法来预创建线程,即在没有任务到来之前就创建corePoolSize个线程或者一个线程。当线程池中的线程数目达到corePoolSize后,就会把到达的任务放到缓存队列当中 maximumPoolSize(线程池最大大小):线程池所允许的最大线程个数,当队列满了,且已创建的线程数...
* tasks. When true, the same keep-alive policy applying to * non-core threads applies also to core threads. To avoid * continual thread replacement, the keep-alive time must be * greater than zero when setting {@code true}. This method ...
Learn how to use ExecutorService in various scenarios to wait for threads to finish their execution. Read more → Custom Thread Pools in Java Parallel Streams Brief intro to custom thread pools and their use in Java 8 parallel streams. Read more → 2. The Thread Pool In Java, thre...