Mutator

Definition

A mutator, also known as a setter method, is a method in a class that modifies the value of an instance variable. It allows us to change the state of an object after it has been created.

Related terms

Accessor Method:

Also known as getter method, it returns the value of an instance variable without modifying it.

Encapsulation:

The principle of bundling data (instance variables) and methods (mutators and accessors) together within a class.

Immutable Object: An object whose state cannot be changed once it is created.