Java Generic Bounded Types - Bounded Generic Types - Using extends in Generics

With bounded generic types, we can limit the types passed into a generic class. We use the extends keyword in generics to make it a Bounded Generic Type and limit the types that can be passed as a type argument.

Timestamps:
00:00 Start
00:16 Create Generic Class
00:35 Create Object Of Generic Class
00:53 Intro To Bounded Types
01:00 Use Bounded Types
02:50 Create New Class
03:20 Use New Class Object As Type Argument

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[rdyrodney]

How to get Id document Firestore in generic method?: ex:

List<T> itemList = new ArrayList<>();

for (DocumentSnapshot doc : query.getDocuments()){

T item = (T) 👈

itemList.add(item);
}