java多线程3种实现方式

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java多线程的实现方式

1.继承Thread类重写run()方法

public class JavaThread01 extends Thread {

    @Override
    public void run() {
        System.out.println("Hello Thread01");
    }

    public static void main(String[] args) {
        JavaThread01 javaThread01 = new JavaThread01();
        javaThread01.start();
    }
}

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2.实现Runnable接口run方法

public class JavaThread02 implements Runnable {
    @Override
    public void run() {
        System.out.println("Hello Thread02");
    }

    public static void main(String[] args) {
        JavaThread02 javaThread02 = new JavaThread02();
        Thread thread = new Thread(javaThread02);
        thread.start();
    }
}

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3.通过线程池提交Callable

/**
* 通过Callable实现多线程，可以抛出异常,获取返回值
**/
public class JavaThread03 {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        ExecutorService executorService = Executors.newCachedThreadPool();
        Future<String> hello_thread03 = executorService.submit(new Callable<String>() {
            @Override
            public String call() throws Exception {
                System.out.println("Hello Thread03");
                return "hello world";
            }
        });

        System.out.println(hello_thread03.get());
    }
}