CallableDemo.java

package com.loon.multithreading;

import java.util.ArrayList;
import java.util.concurrent.*;

/**
 * Created with IntelliJ IDEA.
 * User: Loon
 * Date: 13-4-8
 * Time: 下午10:47
 * To change this template use File | Settings | File Templates.
 */
public class CallableDemo {

    public static void main(String[] args) {
        ExecutorService executorService = Executors.newCachedThreadPool();

        ArrayList<Future<String>> results = new ArrayList<Future<String>>();
        for (int i = 0; i < 5; i++) {
            results.add(executorService.submit(new TaskWithResult(i)));
        }
        for (Future<String> str : results) {
            try {
                System.out.println(str.get());
            } catch (InterruptedException e) {
                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
            } catch (ExecutionException e) {
                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
            } finally {
                executorService.shutdown();
            }

        }

    }
}

class TaskWithResult implements Callable<String> {
    private int id;

    public TaskWithResult(int id) {
        this.id = id;
    }

    @Override
    public String call() throws Exception {
        return "result of TaskWithResult :" + id;
    }
}