java多线程 -- 创建线程的第三者方式 实现Callable接口

package com.company;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

/**
 * Created by MSI1 on 2017/3/30.
 */
public class TestCallableDemo {

    public static void main(String[] args) {

        try {
            DemoThread demoThread = new DemoThread();
            FutureTask<Integer> integerFutureTask = new FutureTask<>(demoThread);
            new Thread(integerFutureTask).start();
            Integer result = integerFutureTask.get();
            System.out.println("result = " + result);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }

    }
}

class DemoThread implements Callable<Integer> {

    @Override
    public Integer call() throws Exception {
        int sum = 0;
        for (int i = 0; i <= 100; i++) {
            sum = sum + i;
        }
        return sum;
    }
}

result = 5050