FutureTask的使用

一、例子：　　　　　　　　　　

package com.cy.test.concurrent;

import com.google.common.collect.Lists;
import java.util.List;
import java.util.concurrent.*;

/**
 * 测试future Task
 */
public class FutureTest {

    private static ExecutorService pool = Executors.newFixedThreadPool(5);

    public static void main(String[] args) {
        List<FutureTask<String>> taskList = Lists.newArrayList();

        for(int i=0; i<5; i++){
            final int temp = i;
            FutureTask<String> future = new FutureTask<String>(new Callable<String>() {
                @Override
                public String call() throws Exception {
                    Thread.sleep(3000);
                    return "zhangsan" + temp;
                }
            });

            //pool.execute(future);
            new Thread(future).start();
            taskList.add(future);
        }

        List<String> nameList = Lists.newArrayList();
        for(FutureTask<String> future : taskList){
            try {
                nameList.add(future.get());
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        System.out.println(nameList);
    }
}

console输出：

[zhangsan0, zhangsan1, zhangsan2, zhangsan3, zhangsan4]

 

二、可以参考这篇博客对future、callable的说明：http://www.cnblogs.com/dolphin0520/p/3949310.html