public final class StockTransaction extends Transaction { } How sealed classes work. The key concept with sealed classes is that they are declared using the sealed keyword, followed by the permits ...

This post explains how to use classes in Java to build objects and organize your code. Also learn: constructors, static methods, and more!

Dynamically extend Java applications. by Bill W. Davis. Dynamically extend Java applications. news. Aug 10, 2001 10 mins. ... public class PricingPlan20 extends Object implements IPricingPlan { ...