Introductory JDX ORM example demonstrating CRUD operations on a basic Java domain class ClassA using SQLite or MySQL. Shows schema auto-creation, queries with filters and ordering, and the JDXHelper convenience API — no manual SQL required.

Introduces JDX ORM JSON-based persistence: a JSON_Employee class extends JDX_JSONObject with only two constructors; all attribute storage uses the JSONObject API. The ORM mapping uses VIRTUAL_ATTRIB declarations. Employees can be built from put calls, a JSONObject, or a raw JSON string.