Java class loaders are a component of the Java virtual machine ... I’ve given an overview of the three main types of class loaders. In this section, we’ll go over each one in more detail.

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...

When compiling class initializers and class initialization blocks, the Java compiler stores the compiled bytecode (in top-down order) in a special method named <clinit>().

Classes would then use the ShapeFactory class to get a Shape object, passing in information about the type of object it needs (i.e. circle, rectangle, square, etc.).