The State Design Pattern is a behavioral design pattern that allows an object to alter its behavior when its internal state changes. This pattern is particularly useful for implementing state machines and ensuring that the object’s behavior remains manageable and modular.
This pattern is useful when an object needs to go through several states, and its behavior differs for each state. Instead of having conditional statements throughout a class to handle state-specific behaviors, the State Design Pattern delegates this responsibility to individual state classes.
Components of State Desgin Pattern
- Context: This is the class that contains an instance of a state and delegates state-specific behavior to the current state object.
- State: An interface that encapsulates the behavior associated with a particular state of the Context.
- Concrete States: Classes that implement the State interface, each representing a specific state and defining its behavior.
