Группа силами, весь набор, который будет заполнен перед записями, возвращается (так как это - неявный вид).
По этой причине (и многие другие), никогда не используйте Группу в подзапросе.
Я верю тому, что вы ' ищется либо CyclicBarrier, либо CountDownLatch.
I was able to get CyclicBarrier to work for my purposes.
Here is the C# code I was trying to reproduce in Java (it's just a demonstration program I wrote to isolate the paradigm, I now use it in C# programs I write to generate video in real time, to provide accurate control of the frame rate):
using System;
using System.Timers;
using System.Threading;
namespace TimerTest
{
class Program
{
static AutoResetEvent are = new AutoResetEvent(false);
static void Main(string[] args)
{
System.Timers.Timer t = new System.Timers.Timer(1000);
t.Elapsed += new ElapsedEventHandler(delegate { are.Set(); });
t.Enabled = true;
while (true)
{
are.WaitOne();
Console.WriteLine("main");
}
}
}
}
and here is the Java code I came up with to do the same thing (using the CyclicBarrier class as suggested in a previous answer):
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.CyclicBarrier;
public class TimerTest2 {
static CyclicBarrier cb;
static class MyTimerTask extends TimerTask {
private CyclicBarrier cb;
public MyTimerTask(CyclicBarrier c) { cb = c; }
public void run() {
try { cb.await(); }
catch (Exception e) { }
}
}
public static void main(String[] args) {
cb = new CyclicBarrier(2);
Timer t = new Timer();
t.schedule(new MyTimerTask(cb), 1000, 1000);
while (true) {
try { cb.await(); }
catch (Exception e) { }
System.out.println("main");
}
}
}