java Callable接口线程返回参数-白红宇

java Callable接口线程返回参数

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发布时间：2019-06-14

本文共 1495 字，大约阅读时间需要 4 分钟。

package com.qd.thread.callable;import java.util.concurrent.Callable;/** * Created by chenlongbo on 2017/4/24. */public class TaskWithResult implements Callable
     
      {    private int id;    public TaskWithResult(int id){        this.id = id;    }    public String call() throws Exception {        return " result of TaskWithResult : "+id;    }}

package com.qd.thread.callable;import java.util.ArrayList;import java.util.concurrent.ExecutionException;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.Future;/** * Created by chenlongbo on 2017/4/24. */public class CallableDemo {    public static void main(String[] args) {        ExecutorService exec = Executors.newCachedThreadPool();        ArrayList
     
      
       > futures = new ArrayList
       
        
         >();        for (int i = 0; i < 10; i++) {            futures.add(exec.submit(new TaskWithResult(i)));        }        for(Future
         
           fs:futures){            try {                System.out.println(fs.get());            } catch (InterruptedException e) {                System.out.println(e);                e.printStackTrace();                return;            } catch (ExecutionException e) {                System.out.println(e);                e.printStackTrace();            }finally {                exec.shutdown();            }        }    }}