There were some important changes to class loaders between Java 8 and Java 9 ... We’ll print out the name of the class loader using the toString() method. When we run the code, we should ...

In java (and for that matter c#) imports (or for c# simple using statements[1]) are simply means to write less explicit type names, nothing more. When you import a class ... 3 or 4 changes to ...

Abstract classes ... name); } } class AbstractClassImpl extends AbstractClassMutation { } It’s a good idea to use an abstract class when you need to implement mutable state. As an example, the ...

What is the single responsibility principle? The single responsibility principle in Java demands that a class serves a single, clear purpose. Any attempt to add peripheral functionality to a ...