public class MyThread implements Runnable {
    @Override
    public void run() {
        System.out.println("hello world");
    }
    public static void main(String[] args) {
        MyThread myThread = new MyThread();
        Thread thread = new Thread(myThread);
        thread.start();
    }
}

public class MyThread1 extends Thread {
    @Override
    public void run() {
        System.out.println("hello");
    }
    public static void main(String[] args) {
        new MyThread1().start();
    }
}

public class MyThread2 implements Callable<String> {
    @Override
    public String call() throws Exception {
        System.out.println("call----");
        return "call";
    }
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        FutureTask<String> futureTask = new FutureTask<>(new MyThread2());
        new Thread(futureTask, "A").start();
        System.out.println(futureTask.get());
    }
}

/**
 * 7个参数
 * 核心线程池大小
 * 最大核心线程池大小
 * 超时了没有人调用就会释放
 * 超时单位
 * 阻塞队列
 * 线程工厂：创建线程的，一般不用动Executors.defaultThreadFactory()
 * 拒绝策略
 */
public ThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue, ThreadFactory threadFactory, RejectedExecutionHandler handle) {
}