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Java Java Data Structures - Retired Exploring the Java Collection Framework Maps

Brian Bartholomew
Brian Bartholomew
1,741 Points

Why are we now using Integer instead of int?

Privious to this video if I wanted to create an integer I would declare it like so.

int  someInteger = 0;

But now we are doing

Integer  someInteger = 0;

Is it because of the object we are returning?

public Map<String, Integer> getSomeMap(){...}

1 Answer

Craig Dennis
STAFF
Craig Dennis
Treehouse Teacher

Yes, you cannot use primitives in Generic type declarations. So a wrapper class is used to autobox.