Wrapper Class: A wrapper class is a class that encapsulates a primitive data type and provides methods for accessing, manipulating, and converting it. For example, Integer is the wrapper class for int.
Primitive Data Type: A primitive data type represents basic values and includes types like int, double, boolean, etc.
Boxing: Boxing refers to the process of converting a primitive data type to its corresponding wrapper class object. It is another term used interchangeably with autoboxing.