package onlyfun.caterpillar;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class ExecutorDemo {
 public static void main(String[] args) {
  ExecutorService service = Executors.newFixedThreadPool(5);

  for(int i = 0; i < 10; i++) {
   final int count = i;
   service.submit
(new Runnable() {
    public void run() {
     System.out.println(count);
     try {
      Thread.sleep(2000);
     } catch (InterruptedException e) {
      e.printStackTrace();
     }

    }
   });
  }

  service.shutdown(); // 最后記得關閉Thread pool
 }
}

ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor( );       
scheduler.schedule(new Runnable( ) {                              
public void run() {                                  
// 排程工作                              
}                          
},                          
30, TimeUnit.SECONDS);

 final ScheduledFuture future = scheduler.scheduleAtFixedRate(new Runnable( ) {                              
 public void run() {                                  
 // 排程工作                                  
 System.out.println("t");                              
 }                          
 },                          
 0, 5, TimeUnit.SECONDS);              
 // 排定 60 秒后取消future       
 scheduler.schedule(new Runnable( ) {           
 public void run( ) {             
 future.cancel(false);           
 }         
 }, 60, TimeUnit.SECONDS);