Callable接口实现线程

public class CallableDemo {
    
    public static void main(String[] args) throws Exception, ExecutionException {
        FutureTask<String> futureTask = new FutureTask<>(new CallableThread());
        new Thread(futureTask,"A").start();
        System.out.println(futureTask.get());//会阻塞，等待执行结束
        System.out.println(Thread.currentThread().getName()+"线程执行结束！");
    }
}

class CallableThread implements Callable<String>{

    @Override
    public String call() throws Exception {
        // TODO Auto-generated method stub
        System.out.println("欢迎使用Callable接口");
        try {
            TimeUnit.SECONDS.sleep(3);
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        return "Call()执行结束";
    }
    
}

public class CallableDemo {
    
    public static void main(String[] args) throws Exception, ExecutionException {
        FutureTask<String> futureTask = new FutureTask<>(new CallableThread());
        new Thread(futureTask,"A").start();
        //System.out.println(futureTask.get());//会阻塞，等待执行结束
        System.out.println(Thread.currentThread().getName()+"线程执行结束！");
        System.out.println(futureTask.get());
    }
}

class CallableThread implements Callable<String>{

    @Override
    public String call() throws Exception {
        // TODO Auto-generated method stub
        System.out.println("欢迎使用Callable接口");
        try {
            TimeUnit.SECONDS.sleep(3);
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        return "Call()执行结束";
    }
    
}