如何在可观察对象中抛出异常？

public class ObservableObject {
    private List<Observer> observers;
    private boolean hasError;

    public ObservableObject() {
        observers = new ArrayList<>();
        hasError = false;
    }

    public void addObserver(Observer observer) {
        observers.add(observer);
    }

    public void removeObserver(Observer observer) {
        observers.remove(observer);
    }

    public void notifyObservers() {
        if (hasError) {
            throw new CustomException("Something went wrong."); // 抛出自定义异常
        }

        for (Observer observer : observers) {
            observer.update();
        }
    }

    public void setError(boolean hasError) {
        this.hasError = hasError;
    }
}

public interface Observer {
    void update();
}

public class CustomException extends RuntimeException {
    public CustomException(String message) {
        super(message);
    }
}