Your Codename One App Can Be an MCP ServerThe Codename One JavaSE port can expose a running simulator or desktop tool over the Model Context Protocol. An agent reads the accessibility semantics tree, performs UI actions on the EDT, and can call application-defined tools.Jul 28, 2026·5 min read
AR And VR In Java: ARKit, ARCore, And A Virtual Room You Can DebugThe new com.codename1.ar and com.codename1.vr packages bring world tracking, plane detection, anchors, stereo rendering and 360 panoramas to Codename One, with a simulated AR room so the whole loop is debuggable in the simulator.Jul 19, 2026·5 min read
The Certificate Wizard Is Now A Standalone App, And It Stopped Impersonating YouThe iOS certificate wizard is now a standalone desktop app launched with mvn cn1:certificatewizard. It authenticates with an App Store Connect API key instead of your Apple ID login, which removes the 2FA and login-flow breakage of the old wizard.Jul 18, 2026·5 min read
How We Beat HotSpot Performance (By Cheating, But Not Like That)ParparVM went from 4.21x slower than warmed Java 25 to geomean parity, with six of ten benchmarks at or below HotSpot and peak memory below the JVM's. The architecture behind it: frameless C codegen, a BiBOP page heap, and a poor man's Valhalla.Jul 17, 2026·21 min read
Game Builder Tutorial 3: Build a First-Person 3D DungeonA code-included walkthrough that builds a first-person 3D dungeon with the Codename One Game Builder — pick a play style, sculpt terrain, build walls, place a spawn, then drive first-person logic in the companion class. Includes a gameplay clip and…Jul 17, 2026·10 min read
VideoIO, PCM Mixing And Timed Whisper CaptionsCodename One can now generate and inspect real video: encode app-rendered frames with audio, decode exact frames back out, mix PCM on a sample clock, and turn Whisper segment timestamps into subtitles.Jul 17, 2026·5 min read
Versioned Builds Are Back, With Master Builds For Fast VerificationVersioned builds return with a Maven-era model: pin a cloud build to a released Codename One version, or build against master to verify the current development head without waiting for a nightly package.Jul 14, 2026·4 min read
