Unit 14: Files, Parsing, and Resource Boundaries

Real applications often persist or import data. The course keeps two responsibilities separate:

obtain text/records from an environment
               |
               v
parse and validate the records as application data

The browser core works with supplied in-memory lines so every learner can master parsing, validation, and record modeling.

The full-JDK lane connects the same parser to real local files with Path, Files, and Java resource-management patterns.

A browser simulation of text input is not evidence that local filesystem behavior works. The lesson labels that boundary honestly.