Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
Unboxing is the automatic conversion of a wrapper class object to its corresponding primitive data type. For example, when an Integer object is assigned to an int variable, unboxing occurs.
Related terms
Wrapper Class: Just like in autoboxing, understanding wrapper classes is crucial for unboxing as well.
Primitive Data Type: Similar to autoboxing, unboxing deals with converting wrapper class objects back into their respective primitive data types.
Unboxing Conversion Error: This term refers to an error that occurs when trying to unbox a null value or incompatible wrapper class object into its corresponding primitive data type.