Learning Java Functional Programming

Implementing the template pattern

The template pattern is based around the idea that certain problems have structures that are reflected in a core method. This method uses the same set of operations to perform a task. This can be seen in a loading task where the basic steps to load a container is essentially the same whether the container is a box or a truck.

The steps are the same, such as prepared item to be loaded, but the specific preparation will vary depending on the container. A box may require that the item be wrapped in paper while the truck may require the application of a plastic wrap.

We will use a game engine to illustrate this template. The basic steps include:

1. Rendering an image.
2. Updating the game.
3. Terminating the game when it is over. ...