Create the project.
Run it. Build for iOS.

Generate

Create a Java project with Initializr.

Choose the Java template, enter the group and artifact names, and download the generated Maven project. Unpack it into a normal source directory, not a temporary download folder.

Verify locally

Run the project in the simulator.

Open the generated project root and let the IDE import its Maven modules. Select the Run in Simulator target, then press Run. Initializr supplies that target for IntelliJ IDEA, NetBeans, Eclipse, and VS Code.

Connect the agent

Give Codex or Claude the project context.

Java 17 projects include the Codename One authoring skill in the downloaded project. Open the project in Codex or Claude Code so the agent can use the framework-specific build, UI, testing, and screenshot instructions instead of guessing.

Run the simulator, open its MCP menu, and choose Install in MCP Hosts. The built-in server lets supported hosts inspect the semantic UI tree, enter text, activate components, and call application tools.

Reach a device

Submit a native build.

Sign in to your Codename One account, then select Build Android or Build iOS from the generated IDE targets. Android builds can start immediately. iOS device builds also need Apple signing assets; the certificate wizard guides that setup. The cloud path runs the native toolchain and returns the device binary without requiring a Mac.

First build complete

Install it, then make one real change.

Download the result from the build dashboard and install it on the target device. Change a label, color, or interaction in the shared project, verify it in the simulator, and submit the next build.