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Java21虚拟线程完整用法

news 2025/7/13 17:20:29

方式1

 Thread.startVirtualThread(new Task());

方式2

Thread virtualThread = Thread.ofVirtual().name("Virtual Thread").unstarted(new Task());
virtualThread.start();

方式3

Thread.ofVirtual().name("Virtual Thread").start(new Task());

方式4

ThreadFactory threadFactory = Thread.ofVirtual().name("Virtual Thread").factory();
threadFactory.newThread(new Task()).start();

方式5

单个虚拟虚拟等待后会立刻执行其他任务，普通线程则会等待，线程设置成1个就能看出来了。

-Djdk.virtualThreadScheduler.parallelism=1 -Djdk.virtualThreadScheduler.maxPoolSize=1

ExecutorService executorService = Executors.newVirtualThreadPerTaskExecutor();
for (int i = 0; i < 10000; i++) {executorService.submit(new Task2());
}

完整的demo


public class Main {public static void main(String[] args) throws IOException {// 方式1
//        Thread.startVirtualThread(new Task());// 方式2
//        Thread virtualThread = Thread.ofVirtual().name("Virtual Thread").unstarted(new Task());
//        virtualThread.start();// 方式3
//        Thread.ofVirtual().name("Virtual Thread").start(new Task());// 方式4
//        ThreadFactory threadFactory = Thread.ofVirtual().name("Virtual Thread").factory();
//        threadFactory.newThread(new Task()).start();// 方式5  单个虚拟虚拟等待后会立刻执行其他任务，普通线程则会等待，线程设置成1个就能看出来了。// -Djdk.virtualThreadScheduler.parallelism=1 -Djdk.virtualThreadScheduler.maxPoolSize=1
//        ExecutorService executorService = Executors.newVirtualThreadPerTaskExecutor();
//        for (int i = 0; i < 10000; i++) {
//            executorService.submit(new Task2());
//        }
//        System.in.read();}static class Task implements Runnable {@Overridepublic void run() {System.out.println(Thread.currentThread());}}static class Task2 implements Runnable {@Overridepublic void run() {System.out.println(Thread.currentThread());try {TimeUnit.SECONDS.sleep(1);} catch (InterruptedException e) {throw new RuntimeException(e);}System.out.println(Thread.currentThread()+" end");}}
}