What is reflection and why is it useful?
What is reflection, and why is it useful? I’m particularly interested in Java, but I assume the principles are the same in any … Read more
terminology
What is dependency injection?
There have been several questions already posted with specific questions about dependency injection, such as when to use it and what frameworks are … Read more
What is reflection and why is it useful?
The name reflection is used to describe code which is able to inspect other code in the same system (or itself). For example, … Read more
What is null in Java?
Is null an instance of anything? No, there is no type which null is an instanceof. 15.20.2 Type Comparison Operator instanceof RelationalExpression: RelationalExpression instanceof ReferenceType At run … Read more
Definition of a Java Container
Referring more generally to the Container pattern (of which an enterprise Java container could be considered a specialization), the book Server Component Patterns … Read more
What is a class constant?
JLS-8.3.1.1. static Fields says (in part) A static field, sometimes called a class variable, is incarnated when the class is initialized (§12.4). JLS-4.12.4. final Variables says (in part) A constant variable is a final variable … Read more