Head First Design Patterns

Chapter 8. The Template Method Pattern: Encapsulating Algorithms

We’re on an encapsulation roll; we’ve encapsulated object creation, method invocation, complex interfaces, ducks, pizzas...what could be next? We’re going to get down to encapsulating pieces of algorithms so that subclasses can hook themselves right into a computation anytime they want. We’re even going to learn about a design principle inspired by Hollywood.

It’s time for some more caffeine

Some people can’t live without their coffee; some people can’t live without their tea. The common ingredient? Caffeine, of course!

But there’s more; tea and coffee are made in very similar ways. Let’s check it out:

Whipping up some coffee and tea classes (in Java)

Let’s play “coding barista” and write some code for creating coffee and tea.

Here’s the coffee:

And now the Tea...

Design Puzzle

You’ve seen that the Coffee and Tea classes have a fair bit ...