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public interface Subject
The Subject interface defines the methods that a Subject must implement in order for Observers to add and remove themselves to/from the Subject.
Method Summary | |
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void |
addObserver(Observer o)
addObserver must be implemented by a concrete subject, in order for observers to add themselves to the subject. |
void |
removeObserver(Observer o)
removeObserver must be implemented by a concrete subject, in order for observers to remove themselves from the subject. |
Method Detail |
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void addObserver(Observer o)
Observer
- o: observer to be added.void removeObserver(Observer o)
Observer
- o: observer to be removed.
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