Junior
What are the reasons for using wrapper classes?
sobes.tech AI
Answer from AI
- Changing data types. Converting primitive types to object types for use in Java collections (e.g.,
List<Integer>instead ofint[]). - Handling
nullvalues. Wrappers can holdnull, whereas primitive types cannot. - Extending functionality. Wrapper classes provide useful methods for working with corresponding data types (e.g.,
Integer.parseInt(),Double.parseDouble(), etc.). - Using in generics. Generics in Java only work with object types.
- Supporting multithreading. Immutable wrapper classes are thread-safe.