The Singleton pattern is a pattern for "ensuring that only one instance of a class exists throughout the entire application." Among the 23 GoF patterns, it has the simplest structure and its name is ...

Singleton, Factory Method, Abstract Factory, and Builder, which we have covered so far, all assumed that objects would be newly created via `new` (constructor calls), regardless of their different ...

Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired (required=true)} ``` --- ## Typically problems - @Component missing - or @ComponentScan not defined properly --- ## ...

This is my summary of the The Pragmatic Programmer, by Andrew Hunt and David Thomas. I use it while learning and as quick reference. It is not intended to be an standalone substitution of the book so ...