как понять почему?
package com.javarush.task.task27.task2712;
import com.javarush.task.task27.task2712.ad.AdvertisementManager;
import com.javarush.task.task27.task2712.ad.NoVideoAvailableException;
import com.javarush.task.task27.task2712.kitchen.Order;
import com.javarush.task.task27.task2712.statistic.StatisticManager;
import com.javarush.task.task27.task2712.statistic.event.NoAvailableVideoEventDataRow;
import java.io.IOException;
import java.util.Observable;
import java.util.logging.Level;
import java.util.logging.Logger;
public class Tablet extends Observable {
private final int number;
private final static Logger logger=Logger.getLogger(Tablet.class.getName());
public Tablet(int number) {
this.number = number;
}
public Order createOrder(){
Order order=null;
try {
order = new Order(this);
if(!order.isEmpty()){
ConsoleHelper.writeMessage(order.toString());
setChanged();
notifyObservers(order);
AdvertisementManager advertisementManager = new AdvertisementManager(order.getTotalCookingTime()*60);
try {
advertisementManager.processVideos();
} catch (NoVideoAvailableException e) {
StatisticManager.getInstance().register(new NoAvailableVideoEventDataRow(order.getTotalCookingTime()));
logger.log(Level.INFO, "No video is available for the order " + order);
}
// setChanged();
// notifyObservers(order);
}
} catch (IOException e) {
logger.log(Level.SEVERE, "Console is unavailable.");
}
return order;
}
@Override
public String toString() {
return "Tablet{number="+this.number+"}";
}
}