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.
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.