i need to Implement at least five design patterns in java ( Singleton, Factory, Façade, state,staratege) in the application. How can I do it

Singleton Pattern

• Singleton pattern is the simplest design pattern in Java that come under the Creational Pattern Category.
• This pattern involves a single class that is responsible to create an object while making sure that only a single object gets created.
• This class provides a way to access its only …