1. getInstance() method of java.util.Calendar, NumberFormat, and ResourceBundle uses factory method design pattern. 2. All the wrapper classes like Integer, Boolean etc, in Java uses this pattern to evaluate the values using valueOf() method. 3. java.nio.charset.Charset.forName(), java.sql.DriverManager#getConnection(), java.net.URL.openConnection(), java.lang.Class.newInstance(), java.lang.Class.forName() are some of their example where factory method design pattern has been used.
The terms Dependency Injection (DI) and Inversion of Control (IoC) are generally used as interchangeably to express the same design pattern. The pattern was initially called IoC, but Martin Fowler (known for designing the enterprise software) anticipated the name as DI because all frameworks or runtime invert the control in some way and he wanted to know which aspect of control was being inverted.
Now you can notice that there no Address data being returned. Why? Simple, because we used a different specification that does not mention the addition of the Address entity. Rather this specification returns the set of developers in the decreasing order of their income. Simple, yet neat right? This is probably one of the coolest design patterns to have on your ASP.NET Core applications.
An excellent example of how design patterns allow you to add new functionality without disturbing existing code is the decorator pattern. The decorator pattern describes how to wrap new functionality around an existing object to provide new functionality to that object without altering its existing code.
A key part of design patterns is that they provide a place where the experience and knowledge of programmers can be assembled. Design patterns come with expert advice on how they can be implemented reliably. 2b1af7f3a8