Java并发ScheduledThreadPoolExecutor类

java.util.concurrent.ScheduledThreadPoolExecutor是ThreadPoolExecutor的子类，并且可以额外地调度在给定延迟之后运行的命令，或定期执行。

实例

以下TestThread程序显示了基于线程的环境中ScheduledThreadPoolExecutor接口的使用。

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;

public class TestThread {

   public static void main(final String[] arguments) throws InterruptedException {
      final ScheduledThreadPoolExecutor scheduler = (ScheduledThreadPoolExecutor)Executors.newScheduledThreadPool(1);

      final ScheduledFuture<?> beepHandler = 
         scheduler.scheduleAtFixedRate(new BeepTask(), 2, 2, TimeUnit.SECONDS);

      scheduler.schedule(new Runnable() {
         @Override
         public void run() {
            beepHandler.cancel(true);
            scheduler.shutdown();            
         }
      }, 10, TimeUnit.SECONDS);
   }  

   static class BeepTask implements Runnable {
      public void run() {
         System.out.println("beep");      
      }
   }
}

这将产生以下结果 -

beep
beep
beep
beep
beep