Java 相当于 .Net's AutoResetEvent？

@user249654的答案看起来很有希望。我添加了一些单元测试来验证它，并且它确实按预期工作。

我还添加了一个重载，这需要一个超时。waitOne

代码在这里，以防其他人发现它有用：

单元测试

import org.junit.Assert;
import org.junit.Test;

import static java.lang.System.currentTimeMillis;

/**
 * @author Drew Noakes http://drewnoakes.com
 */
public class AutoResetEventTest
{
    @Test
    public void synchronisesProperly() throws InterruptedException
    {
        final AutoResetEvent event1 = new AutoResetEvent(false);
        final AutoResetEvent event2 = new AutoResetEvent(false);
        final int loopCount = 10;
        final int sleepMillis = 50;

        Thread thread1 = new Thread(new Runnable()
        {
            @Override
            public void run()
            {
                try {
                    for (int i = 0; i < loopCount; i++)
                    {
                        long t = currentTimeMillis();
                        event1.waitOne();
                        Assert.assertTrue("Time to wait should be within 5ms of sleep time",
                                Math.abs(currentTimeMillis() - t - sleepMillis) < 5);
                        Thread.sleep(sleepMillis);
                        t = currentTimeMillis();
                        event2.set();
                        Assert.assertTrue("Time to set should be within 1ms", currentTimeMillis() - t <= 1);
                    }
                } catch (InterruptedException e) {
                    Assert.fail();
                }
            }
        });

        Thread thread2 = new Thread(new Runnable()
        {
            @Override
            public void run()
            {
                try {
                    for (int i = 0; i < loopCount; i++)
                    {
                        Thread.sleep(sleepMillis);
                        long t = currentTimeMillis();
                        event1.set();
                        Assert.assertTrue("Time to set should be within 1ms", currentTimeMillis() - t <= 1);
                        t = currentTimeMillis();
                        event2.waitOne();
                        Assert.assertTrue("Time to wait should be within 5ms of sleep time",
                                Math.abs(currentTimeMillis() - t - sleepMillis) < 5);
                    }
                } catch (InterruptedException e) {
                    Assert.fail();
                }
            }
        });

        long t = currentTimeMillis();

        thread1.start();
        thread2.start();

        int maxTimeMillis = loopCount * sleepMillis * 2 * 2;

        thread1.join(maxTimeMillis);
        thread2.join(maxTimeMillis);

        Assert.assertTrue("Thread should not be blocked.", currentTimeMillis() - t < maxTimeMillis);
    }

    @Test
    public void timeout() throws InterruptedException
    {
        AutoResetEvent event = new AutoResetEvent(false);

        int timeoutMillis = 100;
        long t = currentTimeMillis();
        event.waitOne(timeoutMillis);
        long took = currentTimeMillis() - t;
        Assert.assertTrue("Timeout should have occurred, taking within 5ms of the timeout period, but took " + took,
                Math.abs(took - timeoutMillis) < 5);
    }

    @Test
    public void noBlockIfInitiallyOpen() throws InterruptedException
    {
        AutoResetEvent event = new AutoResetEvent(true);

        long t = currentTimeMillis();
        event.waitOne(200);
        Assert.assertTrue("Should not have taken very long to wait when already open",
                Math.abs(currentTimeMillis() - t) < 5);
    }
}

自动重置具有接受超时的过载事件

public class AutoResetEvent
{
    private final Object _monitor = new Object();
    private volatile boolean _isOpen = false;

    public AutoResetEvent(boolean open)
    {
        _isOpen = open;
    }

    public void waitOne() throws InterruptedException
    {
        synchronized (_monitor) {
            while (!_isOpen) {
                _monitor.wait();
            }
            _isOpen = false;
        }
    }

    public void waitOne(long timeout) throws InterruptedException
    {
        synchronized (_monitor) {
            long t = System.currentTimeMillis();
            while (!_isOpen) {
                _monitor.wait(timeout);
                // Check for timeout
                if (System.currentTimeMillis() - t >= timeout)
                    break;
            }
            _isOpen = false;
        }
    }

    public void set()
    {
        synchronized (_monitor) {
            _isOpen = true;
            _monitor.notify();
        }
    }

    public void reset()
    {
        _isOpen = false;
    }
}

class AutoResetEvent {

  private final Object monitor = new Object();
  private volatile boolean open = false;

  public AutoResetEvent(boolean open) {
    this.open = open;
  }

  public void waitOne() throws InterruptedException {
    synchronized (monitor) {
      while (open == false) { 
        monitor.wait();
      }
      open = false; // close for other
    }

  }

  public void set() {
    synchronized (monitor) {
      open = true;
      monitor.notify(); // open one 
    }
  }

  public void reset() {//close stop
    open = false;
  }
}