Head first design mode observation mode note

In fact, it is a bit similar to the relationship between the newspaper publishing house and the subscriber. An observer needs to make an intermediate layer to determine whether to update the data. In fact, this is designed to represent an interface for the observer, and then the subscriber inherits the observer interface. The relationship between the newspaper club and the subscriber is loose. When the newspaper club has something new, it directly updates the interface, and then the interface updates the subscriber. Public void measurementschanged (float temperature, float humidity, Float Pressure)

{

For (INT I = 0; I <observers. Size (); I ++)

{

....

}

}