What is the difference between wrapper classes and primitives in Java?

What is the difference between wrapper classes and primitives in Java?

In Java, primitive types are the basic data types like int, char, and boolean. Wrapper classes, like Integer and Character, are used to wrap these primitives into objects.

Why would I use wrapper classes instead of primitives?

Wrapper classes provide additional functionality, such as methods for converting between types and handling null values, which primitives cannot do.

Can you give me an example of when to use a wrapper class?

Sure! If you need to store a number in a collection like ArrayList, you must use the Integer wrapper class instead of the primitive int.

Are there performance implications when using wrapper classes?

Yes, wrapper classes can introduce overhead due to object creation and memory usage, so it's important to use them judiciously.