design-patterns

The Singleton, Factory Method, Adapter, Composite, and Observer design patterns are all demonstrated together.

• Singleton ensures that there is only one instance of the Singleton class.

• Factory Method is used to create objects based on a common interface.

• Adapter allows the AdapterLegacySystem to adapt the legacy system's interface to the Product interface.

• Composite represents a part-whole hierarchy with Component, Leaf, and Composite classes.

• Observer defines a one-to-many relationship between the Subject and multiple Observer objects.

This example showcases the integration of these design patterns into a single application, illustrating how they can work together in a cohesive manner.