--- title: Introduction to Cross-Platform Java Development With... description: Codename One is an open-source platform that lets Java and Kotlin developers build cross-platform apps (iOS, Android, JavaScript, Windows, macOS) from a single... canonical: https://daily.dev/posts/introduction-to-cross-platform-java-development-with-codename-one-equaxwt04 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Introduction to Cross-Platform Java Development With Codename One | daily.dev og:description: Codename One is an open-source platform that lets Java and Kotlin developers build cross-platform apps (iOS, Android, JavaScript, Windows, macOS) from a single... og:url: https://daily.dev/posts/introduction-to-cross-platform-java-development-with-codename-one-equaxwt04 og:image: https://api.daily.dev/og/posts/eqUaXwT04.png og:image:alt: Introduction to Cross-Platform Java Development With Codename One og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Introduction to Cross-Platform Java Development With Codename One **[Baeldung](https://daily.dev/sources/baeldung)** · 17 min read · 12 upvotes · 0 comments ## Summary Codename One is an open-source platform that lets Java and Kotlin developers build cross-platform apps (iOS, Android, JavaScript, Windows, macOS) from a single Maven-based codebase. This tutorial walks through building a 'Daily Routine' app with Java 17, covering project setup via the Codename One Initializr, application lifecycle, form-based navigation, responsive UI with layout managers and CSS UIIDs, local JSON persistence, repository and service patterns, REST integration with the Geoapify API, JSON parsing, and embedded map previews using BrowserComponent with Leaflet. The tutorial emphasizes keeping forms focused on UI while delegating persistence, networking, and business logic to dedicated services and repositories. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [The Codename One JavaScript Port Is Now Free and Open Source](https://daily.dev/posts/the-codename-one-javascript-port-is-now-free-and-open-source-r5rbkxrg9) · Foojay.io · 10 upvotes · 1 comments - [Native Java Win32, 3D Gaming, Printing and Wallet](https://daily.dev/posts/native-java-win32-3d-gaming-printing-and-wallet-m9a9jxnnb) · Foojay.io · 2 upvotes · 0 comments - [On-Device Debugging And JUnit 5](https://daily.dev/posts/on-device-debugging-and-junit-5-2gr7evpzb) · Foojay.io · 0 upvotes · 0 comments - [Native Linux, Apple Watch, A Game Builder And Crash Protection](https://daily.dev/posts/native-linux-apple-watch-a-game-builder-and-crash-protection-bcydquptm) · Foojay.io · 0 upvotes · 0 comments - [Skills, Java 17, And Theme Accents with Codename One](https://daily.dev/posts/skills-java-17-and-theme-accents-with-codename-one-z6j5zcuxi) · Foojay.io · 3 upvotes · 0 comments --- Tags: [#java](https://daily.dev/tags/java), [#rest-api](https://daily.dev/tags/rest-api), [#maven](https://daily.dev/tags/maven) [View this post on daily.dev](https://daily.dev/posts/introduction-to-cross-platform-java-development-with-codename-one-equaxwt04) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Introduction to Cross-Platform Java Development With Codename One","url":"https://daily.dev/posts/introduction-to-cross-platform-java-development-with-codename-one-equaxwt04","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/introduction-to-cross-platform-java-development-with-codename-one-equaxwt04"},"datePublished":"2026-06-08T16:54:43.478Z","dateModified":"2026-06-08T17:18:46.551Z","description":"Codename One is an open-source platform that lets Java and Kotlin developers build cross-platform apps (iOS, Android, JavaScript, Windows, macOS) from a single...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d44a07f075d9c6bbf1c118f4c9a6366c?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d44a07f075d9c6bbf1c118f4c9a6366c?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Baeldung","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Baeldung","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/52cccfb454d946c4b7dfa5e816f9e576","url":"https://daily.dev/sources/baeldung"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/introduction-to-cross-platform-java-development-with-codename-one-equaxwt04","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":12},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"java,rest-api,maven","timeRequired":"PT17M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Baeldung","item":"https://daily.dev/sources/baeldung"},{"@type":"ListItem","position":3,"name":"Introduction to Cross-Platform Java Development With Codename One"}]} ```