创建线程5种方法

1、继承Thread，重写run方法，调用start启动

2、实现Runnable接口，重写run方法，调用start启动。

3、lambda表达式

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public class MyThread {       static class MyExtend extends Thread{         @Override         public void run() {             System.out.println("Thread");         }     }       static class MyRun implements Runnable{         @Override         public void run() {             System.out.println("Thread");         }     }       public static void main(String[] args) {         new MyExtend().start();         new Thread(new MyRun()).start();         new Thread(()->{             System.out.println("Thread");         }).start();     } }

4、对于继承Thread和实现Runnable哪种更好？

　　实现更好，java是单继承多实现的

5、线程池创建线程

        ExecutorService service = Executors.newCachedThreadPool();
        service.execute(()->{
            System.out.println("Thread");
        });
        service.shutdown();    

6、实现Callable接口

　　因为实现Runnale接口返回值是写死的void，不灵活，Callable接口返回值可以自己设定

?

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public class MyCallable implements Callable<String > {       @Override     public String call() throws Exception {         return "success";     }       public static void main(String[] args) throws ExecutionException, InterruptedException {         ExecutorService service = Executors.newCachedThreadPool();         Future<String> submit = service.submit(new MyCallable());         String s = submit.get();         System.out.println(s);         service.shutdown();     } }