Additional Notes
Nullability: Why use wrapper types?
Track: Java
Topic: Core Java
Focus: Wrapper Types and Autoboxing
Java: Wrapper Types and Autoboxing
Answer
Wrappers can represent non-existent values with null.
In Java, primitive types can't be null, making them unsuitable for optional data. Wrapper types, like 'Integer', can be null, representing an absent value in database operations or APIs. For example, 'Integer stock = null;' can indicate out-of-stock items in an e-commerce app.
In Java, primitive types can't be null, making them unsuitable for optional data. Wrapper types, like 'Integer', can be null, representing an absent value in database operations or APIs. For example, 'Integer stock = null;' can indicate out-of-stock items in an e-commerce app.
Topics: Core Java Java Wrapper Types and Autoboxing