用OpenJDK 19织机使用Project /Virtual的问题

Question

我试图在Java中测试虚拟线程引用织机项目，并使用以下JDK 19-loom版本：

​

​

  package com;

import java.util.concurrent.ThreadFactory;

    public class a {
    
    
        public static void main (String [] args) throws Exception{
            Runnable printThread = () -> System.out.println(Thread.currentThread());
    
            ThreadFactory virtualThreadFactory = Thread.builder().virtual().factory();
            ThreadFactory kernelThreadFactory = Thread.builder().factory();
    
            Thread virtualThread = virtualThreadFactory.newThread(printThread);
            Thread kernelThread = kernelThreadFactory.newThread(printThread);
    
            virtualThread.start();
            kernelThread.start();
    
        }
    }

我有以下IntelliJ配置：

​

​

但我有以下错误：

​

​

并且线程的生成器似乎没有被识别出来。

​

​

，我想知道我还需要什么？

Answer 1

你用的是一个过时的例子。

在织机的当前状态下，您的示例必须如下所示

public static void main(String[] args) throws InterruptedException {
    Runnable printThread = () -> System.out.println(Thread.currentThread());

    ThreadFactory virtualThreadFactory = Thread.ofVirtual().factory();
    ThreadFactory kernelThreadFactory = Thread.ofPlatform().factory();

    Thread virtualThread = virtualThreadFactory.newThread(printThread);
    Thread kernelThread = kernelThreadFactory.newThread(printThread);

    virtualThread.start();
    kernelThread.start();

    virtualThread.join();
    kernelThread.join();
}

但是您也可以使用简化的

public static void main(String[] args) throws InterruptedException {
    Runnable printThread = () -> System.out.println(Thread.currentThread());

    Thread virtualThread = Thread.startVirtualThread(printThread);
    Thread kernelThread = Thread.ofPlatform().start(printThread);

    virtualThread.join();
    kernelThread.join();
}

请记住，这是正在进行的工作，文档可能很快就会过时。