FromMethods

FromMethods is a programming concept that allows for the creation of objects of a specific class through a static factory method. Instead of using the traditional `new` keyword to instantiate an object, a static method within the class itself is called, which then returns an instance of that class. This approach offers several advantages over direct instantiation.

One primary benefit of FromMethods is improved readability and expressiveness. A well-named static factory method can clearly indicate the purpose or characteristics of the object being created. For example, a method named `fromUser(String username)` is more descriptive than `new User(username)`. This can make code easier to understand and maintain.

Another advantage is the ability to control object creation. FromMethods can return existing instances from a cache, thus saving resources and ensuring that only one instance of a particular object exists (similar to the Singleton pattern). They can also return subtypes of the class, allowing for more flexibility in the return type without the client code needing to know the specific subclass being instantiated.

Furthermore, static factory methods are not required to create a new object every time they are called. This can be useful for implementing caching or pooling strategies. The naming convention for these methods often starts with words like `from`, `of`, `getInstance`, `create`, or `newInstance` to indicate their factory-like nature. While powerful, it's important to note that classes relying heavily on FromMethods will not have public constructors, which can affect how subclasses are designed or how objects are mocked for testing purposes.