Learn how to use lazy instantiation and eager instantiation in your Java programs. Which approach is better? It depends on the scenario. When instantiating Java objects that are expensive in terms of ...

Dependency injection is an advanced topic. The term was coined by Martin Fowler in 2004 to describe the new, novel and almost magical way that inversion of control containers initialized the ...

Nested classes are classes that are declared as members of other classes or scopes. Nesting classes is one way to better organize your code. For example, say you have a non-nested class (also known as ...