This is an introduction tutorial on how to create a REST API that performs CRUD operations. It can get, add, updated and delete data.

In Strategy pattern, we create objects which represent various strategies and a context object whose behavior varies as per its strategy object.

Since Java 9 every new Java version has incubator modules, which contain features that are still in development and they can be tested by developers.One of these incubators is the Foreign-Memory Access API (JEP 370) that will be introduced in this tutorial.

This is an introduction into the differences regarding the features, the assert commands ("assertFalse", "assertEquals", etc.) and the annotations ("@BeforeEach", etc.) of the two popular testing frameworks "JUnit" and "TestNg".