Thread、Runnable、Callable三种实现方式

Thread

public class ThreadDemo extends Thread {

    public static void main(String[] args) {
        ThreadDemo threadDemo = new ThreadDemo();
        threadDemo.setName("ThreadDemo");
        threadDemo.start();
    }
}

 

Runnable

public class RunnableDemo {

    public static void main(String[] args) {
        RunnableThread runnableThread = new RunnableThread();
        Thread thread = new Thread(runnableThread);
        thread.setName("RunnableThread");
        thread.start();
    }
}

class RunnableThread implements Runnable {

    public void run() {
        System.out.println("execute RunnableThread");
    }
}

 

Callable

public class CallableDemo {

    public static void main(String[] args) {
        ExecutorService thread = Executors.newSingleThreadExecutor();
        try {
            CallableThread callableThread = new CallableThread();
            Future<Integer> future = thread.submit(callableThread);
            Integer result = future.get();
            System.out.println("Result=" + result);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        } catch (ExecutionException e) {
            throw new RuntimeException(e);
        } finally {
            if (thread != null && !thread.isShutdown()) {
                thread.shutdown();
            }
        }
    }
}

class CallableThread implements Callable<Integer> {

    @Override
    public Integer call() throws Exception {
        return 100;
    }
}