Java介绍线程的创建方式

线程的创建方式常用有3种，继承Thread;实现Runnable;有返回的Future

一：继承Thread

public class MyThread extends Thread{
    @Override
    public void run() {
        System.out.println("my first thread");
    }

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

二：实现Runnable

public class MyRunable implements Runnable {
    
    @Override
    public void run() {
        System.out.println("my first Runnable");
    }

    public static void main(String[] args){
        MyRunable myRunable = new MyRunable();
        Thread thread1 = new Thread(myRunable);
        Thread thread2 = new Thread(myRunable);
        thread1.start();
        thread2.start();
    }
}

三：使用Future的子类

public class MyFuture {


    public static void main(String[] args) throws Exception {

        Callable ca = new Callable() {

            @Override
            public String call() throws Exception {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                return "下班";
            }
        };

        FutureTask