Observer

Type Parameters:

T - The class type that will be received every time this class receives an update.

All Known Implementing Classes:

ChoppingStation, CookingStation, IngredientStation, RecipeStation, Station
```
public interface Observer<T>
```
An observer can be implemented in a way where it can be registered with a Subject of the same type T which will contains a central value which notifies this observer every time that value changes.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addSubject(Subject<T> subject)`
`void`	`deregisterFromAllSubjects()`
`java.util.List<Subject<T>>`	`getSubjects()`
`void`	`removeSubject(Subject<T> subject)`
`void`	`update(T update)`	Lets the implementation of Observer deal with the new value that was set in the Subject.

- Method Detail
  - update
```
void update(T update)
```
    Lets the implementation of Observer deal with the new value that was set in the Subject.
    
    Parameters:
    
    update - The message or value being passed from the Subject to this Observer.
  - addSubject
```
void addSubject(Subject<T> subject)
```
  - removeSubject
```
void removeSubject(Subject<T> subject)
```
  - getSubjects
```
java.util.List<Subject<T>> getSubjects()
```
  - deregisterFromAllSubjects
```
void deregisterFromAllSubjects()
```