Easily create native apps using Java™ for iOS, Android, Windows, RIM and more!

Codename One powers more than 22,000,000 devices

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Codename One is the only Java iOS tool that currently comes close to the old "Write once, run anywhere" mantra...

JavaWorld

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Java Cloud

Use Eclipse, NetBeans or IDEA to build native mobile apps using the cloud.

Java Cloud

Use Eclipse, NetBeans or IDEA dev environments & our GUI builder. Quick & easy install! Build native apps using our cloud build servers.

Try Now!

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Free & Open Source

Codename One is open source & free for use!

Open Source

Codename One has an amazing supportive community of developers, it is open source and free for both commercial & non-commercial use!

Community Forum

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Fast & Native

Java bytecode is translated to native C/ObjC code and compiled using xcode for seamless mobile application development

Fast & Native

Codename One adapts the code to match the native platform, on iOS the bytecode is statically translated to C/Obj-C and compiled on the server. On Android Codename One leverages Dalvik and so forth!

How Does It Work?

Press

• If I had to choose a startup to invest in this year, it would have to be Codename One. [...] I expect them to experience significant growth in 2013.
• Codename One is the only Java iOS tool that currently comes close to the old "Write once, run anywhere" mantra, and it provides the most coherent development experience.
• Codename One [...] stands to drastically change the rate and cost at which developers will churn out new mobile apps.
• Codename One [...] uses special lightweight technology that eliminates fragmentation and offers developers a platform for mobile application development as easy as desktop development.
• The Java development/debugging is done entirely locally, but when building for the device, the cloud portion does all the heavy lifting

Learn about Codename One based on what you already know...

Android developer

Swing developer

Executive

Java Developer

Built with Codename One (click items to launch extended gallery)

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  yHomework

  iOS, Android
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  Pumpop

  Android, J2ME
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  iRegion

  iPhone/iPad, RIM, Android
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  Readerware

  Android, iOS

Latest entries from our blog

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  Permalink Dec 4, 2013

  Adding Google Play Ad's

  We are officially code frozen so only critical bug fixes should be resolved until the actual release. The very last feature to make it in is support for Google Play Ads on iOS/Android. We currently only work with the Admob SDK as we move along we might add additional options...

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  Permalink Dec 2, 2013

  Using The New Facebook API

  We recently introduced a new Facebook API to allow native integration since Facebook has stated their intention to no longer accept OAuth logins from applications. This is very much work in progress so some things will change as we move along...

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  Permalink Nov 27, 2013

  O'Reilly Blog, Sharing & Performance

  I've just written a blog post for O'Reilly media and we'd very much appreciate it if you check it out, share it (ideally via the social media buttons on it) and spread it to your friends/colleagues. Please take the 5 minutes to do this as this would be very helpful for us. Thank you.

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  Permalink Nov 25, 2013

  Fast Push Communication Using PubNub

  This came out 5 months ago but the guy from PubNub didn't update us on the status so we just didn't notice this until now. That's probably a good sign of us being too busy. There is now official PubNub integration for Codename One, which means you can get push like fast 2 way communications...

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  Permalink Nov 20, 2013

  Facebook, Better Input & Improving Community Support

  Facebook has changed the rules yet again, this time related to logging in to Facebook from 3rd party applications. Up until now we used the web based OAuth approach for logging into Facebook since that allowed us...

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  Permalink Nov 18, 2013

  Preparing For 2.0

  We are now finalizing the features for Codename One 2.0. Yes we are skipping the 1.2 revision and going up to the 2nd generation which we feel is warranted given the amount of features added since the May release of 1.1. We will make the release in December which...