https://www.linkedin.com/learning/java-with-json

JSON is often used as the encoding for data sent and received by web services, but it can also be used to store data in files and much more. Understanding how JSON works is crucial to building feature-rich applications and experiences. 

In this course, instructor Jon-Luke West goes over the use of data serialization/deserialization, the way JSON acts as the format, the syntax of JSON, how to read and write JSON in an application, and additional ways you can control the way data is handled. Jon-Luke begins with JSON basics, such as data interchange formats, primitives, and reading and writing JSON. He walks you through a simple JSON implementation, then shows you how to work with arrays. Plus, Jon-Luke covers additional formatting and customization options, like writing, reading, and testing nested JSON, as well as selecting fields to expose, handling null values, and much more.