FutureTask配合Thread——FutureTask能够接收Callable类型的参数，用来处理有返回结果的情况

package cn.itcast.test;

import lombok.extern.slf4j.Slf4j;

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

@Slf4j(topic = "c.Test3")
public class Test3 {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        FutureTask<Integer> task=new FutureTask<>(new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                log.debug("running~");
                Thread.sleep(2000);
                return 100;
            }
        });
        Thread t1 = new Thread(task, "t1");
        t1.start();
        log.debug("结果是：{}",task.get());
    }
}