lab8 apd

tpe.shutdown();

try {
    if (!tpe.awaitTermination(1, TimeUnit.SECONDS)) {
        tpe.shutdownNow();
        if (!tpe.awaitTermination(1, TimeUnit.SECONDS))
            System.err.println("Thread pool did not finish");
        }
} catch (InterruptedException e) {
    e.printStackTrace();
}