Callable拿到线程执行结果

package com.ygl;



 import java.util.concurrent.Callable;

 import java.util.concurrent.ExecutionException;

 import java.util.concurrent.ExecutorService;

 import java.util.concurrent.Executors;

 import java.util.concurrent.Future;



 public class CallableAndFuture {

 public static void main(String[] args) {

    ExecutorService threadPool=
 Executors.newSingleThreadExecutor();

    Future<String> future= threadPool.
submit(new Callable<String>(){

          public String call(){

       
   try {

Thread.sleep(2000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

       
    return "hello";

          }

  

  

    });

    try {

 System.out.println(future.get());  

 } catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

 } catch (ExecutionException e) {

// TODO Auto-generated catch block

e.printStackTrace();

 }

 }

 }