线程《一：创建线程的方式》

创建线程的方式：1.继承Thread，2实现Runnable接口，3 实现Callable接口，4Future接口

1.
//实现Thread类
public class MyThread extends Thread {
    @Override
    public void run() {
        System.out.println("I am  thread");
    }
}

2.
//实现Runnable接口
public class MyThreadRunnable implements  Runnable {
    @Override
    public void run() {
        System.out.println("I am  Runnable");
    }
}

   3，4  FutureTask futureTask=new FutureTask(new Callable() {
         @Override
         public Object call() throws Exception {
             return "Callable";
         }
     });
        futureTask.run();
        try {
            System.out.println(futureTask.get());//输出Callable
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }

还可以指定泛型
   FutureTask future=new FutureTask(new Callable() {
            @Override
            public Long call() throws Exception {
                return 1L;
            }
        });
        future.run();
        System.out.println(future.get());