Introduction
Prerequisite for any Customization
Customizations must be performed in a development environment.
Before starting any customization, you must first install the HOPEX Application Server customization module.

For detailed information, see
MODULES > Managing the Customization Lifecycle documentation.
HOPEX Studio vs Java report
HOPEX Studio enables to quickly generate simple reports but does not provide as many possibilities as the reports written in Java do. You first need to identify which of the two techniques best suits your needs.
Java Reports provide more extensive possibilities but require development skills, as it is required to implement a macro in Java.

See Writing Java Report Chapters Technical Article.