Java Thread - 如何使用CyclicBarrier和TimerTask

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import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.CyclicBarrier;
public class Main {
  static CyclicBarrier cb;
  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");
    }
  }
}
class MyTimerTask extends TimerTask {
  private CyclicBarrier cb;
  public MyTimerTask(CyclicBarrier c) {
    cb = c;
  }
  public void run() {
    try {
      cb.await();
    } catch (Exception e) {
    }
 
 
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