# The App Server is the Development Environment

The Software Development Kit development environment is built on a standard app server install of the product being customized. Put another way, the app server is the development environment.

Source code is written and generated within the app server directory structure and executables are generated where the app server expects them and are therefore ready to be executed.

For example:

- UI code is written directly where the app server looks for them.
- The jar file for the Java programs is created directly where the app server looks for it.

Parent topic: Overview