The most common example of abstraction is using the service-repository pattern to handle data access. With this pattern, a developer can change the data back end without rewriting the application code ...

In this Java code challenge, you’ll learn about the Command design pattern and see several examples of the pattern in practice. I will also discuss how the Command pattern implements two core ...

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 ...

The code pattern “Create a real-time object detection app using Watson Machine Learning” was built with the expectation that the developer would have zero machine learning experience.