Java EE 8 Design Patterns and Best Practices

Explaining the Gang of Four design patterns

The Gang of Four (GoF) design patterns are 23 patterns that are classified as creational patterns, structural patterns, and behavioral patterns. The creational patterns control the creation and initialization of the object and class selection; the structural patterns define the relationship between classes and objects, and the behavioral patterns control the communication and interaction between objects. As well as this, the GoF design patterns have two types of scope which define the focus of solutions. These scopes are object scope, which resolves problems about object relations, and class scope, which resolves problems about class relations. 

The object scope works with composition and the behavior ...