Callable 博客分类： 基础知识 java

  1 import java.lang.Thread;
  2 import java.util.concurrent.Callable;
  3 import java.util.concurrent.Future;
  4 import java.util.concurrent.Executors;
  5 import java.util.concurrent.ExecutorService;
  6 import java.util.concurrent.ExecutionException;
  7
  8 class runclass implements Callable<String> {
  9     private long id = 0;
 10     public runclass(long id){
 11         this.id = id;
 12     }
 13    
 14     @Override
 15     public String call(){
 16         return "id = " + id;
 17     }  
 18 }
 19
 20 class test {
 21     public static void main(String[] args) throws InterruptedException, ExecutionException {
 22         ExecutorService exec = Executors.newCachedThreadPool();
 23         Future<String> result = exec.submit(new runclass(1L));
 24         while (true){
 25             Thread.sleep(1000);
 26             if (result.isDone()){
 27                 System.out.println(result.get());
 28                 break;
 29             }  
 30         }  
 31         exec.shutdown();
 32     }  
 33 }