public static void main(String... argv){
        new Thread(()->{
            System.out.println("running");
            try {
                TimeUnit.SECONDS.sleep(15);
            } catch (InterruptedException ex) {
                Logger.getLogger(SimpleLambda.class.getName()).log(Level.SEVERE, null, ex);
            }
            System.out.println("over!");
        }).start();
    }