The Observable design pattern is used in many important Java APIs. One well-known example is a JButton that uses the ActionListener API to execute an action. In this example, we have an ...

For the hardware folks, these design patterns are here to muscle-up your toolbox of software techniques with sensors you’ve likely seen before.

Before we dive into the Composite pattern, I must first define composite objects: objects that contain other objects; for example, a drawing may be composed of graphic primitives, such as lines ...