Juc

public class ThreadPoolExecutorDemo {

    public static void main(String[] args) {
        MyThread myThread = new MyThread();
        myThread.start();

        System.out.println("主线程结束");
    }

    static class MyThread extends Thread{

        @Override
        public void run() {
            System.out.println("this is MyThread");
        }
    }
}

public class ThreadPoolExecutorDemo {

    public static void main(String[] args) {

        //1. 使用匿名内部类的写法
        Thread t0 = new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println("子线程t0");
            }
        });
        t0.start();

        //2. 使用lambda表达式的写法
        Thread t1 = new Thread(()->{
            System.out.println("这是子线程t1");
        });
        t1.start();

        System.out.println("主线程结束");
    }


}

public class ThreadPoolExecutorDemo {

    public static void main(String[] args) {

        //把Callable对象传给FutureTask
        FutureTask<String> futureTask = new FutureTask(new Callable() {
            @Override
            public Object call() throws Exception {
                return "子线程futuretask";
            }
        });

        Thread t3 = new Thread(futureTask);
        t3.start();

        //这里是个阻塞方法，会等待子线程返回result后，主线程才会继续执行
        try {
            String result = futureTask.get();
            System.out.println(result);
        } catch (Exception e) {
            e.printStackTrace();
        }

        System.out.println("主线程结束");
    }


}