Strategy – When Behavior Needs to Be Flexible
In many applications, you don’t just create objects — you also need to define how they behave. And that behavior can change. Discount calculation, payment[…]
Factory – When new Becomes a Problem
When you start coding, creating objects is simple: Product product = new Product(); But as your application grows, object creation often becomes… messy. At some[…]
Builder – When a Constructor Is Not Enough
Imagine you need to create an object with a dozen fields — some required, some optional, some dependent on each other, and some that must[…]