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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.
Easily create native apps using Java™ for iOS, Android, Windows, RIM and more!
Codename One powers more than 40,000,000 devices
Free Download »Codename One is the only Java iOS tool that currently comes close to the old "Write once, run anywhere" mantra...
JavaWorld
Press
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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.
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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.
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Codename One [...] stands to drastically change the rate and cost at which developers will churn out new mobile apps.
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Codename One [...] uses special lightweight technology that eliminates fragmentation and offers developers a platform for mobile application development as easy as desktop development.
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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...
Built with Codename One (click items to launch extended gallery)
Latest entries from our blog
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Microbenchmarks
Microbenchmarks are often derided in the Java community with some good reason, they show edge cases that either present the JIT in a bad light or show it as ridiculously (unrealistically) fast...
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Intercepting URL's On iOS & Android
A common trick in mobile application development, is communication between two unrelated applications. In Android we have intents which are pretty elaborate and can be used via Display.execute, however what if you would like to expose the functionality of...
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Can Execute
Runtime.exec is pretty familiar to Java developers (and the process builder in later versions), however for mobile applications we usually don't have access to an executable. The solution is to invoke a URL which is bound...
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Developer Promotion - practical guide & statistics about the Java ecosystem
Before we launched our recent promotion for JavaOne tickets with Java Code Geeks we sought out guides/tutorials about running such a promotion, unfortunately we didn't find anything useful so we had to improvise and work by instinct...
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Perspective Transform
Over the weekend Steve posted a really cool demo showing off some of his work on the new iOS graphics pipeline, specifically the perspective transform. Perspective transform allows us to rotate elements in a 3 dimensional space to create pretty nifty effects. Right now this is only supported on...
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Same Size & Back Swipe
Codename One inherited basic layout concepts from Swing which in turn inherited them from AWT. We modernized and adapted them quite a bit by removing various behaviors and adding others, but a key to sizing and placing components is the preferred size...
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Codename One & Java Code Geeks are giving away free JavaOne Tickets (worth $3,300)!
Would you like to go to JavaOne? Besides being a cool conference its loads of fun with shows and events thru-out the city. Now you have a chance...
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Garbage Collection
We've been spending an excessive amount of time tuning our garbage collection and memory management of the new iOS VM based on profiler output. This is one of the cool features in the approach we took (translating Java to C rather than going directly...
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Not A Dialog - Again
When we introduced the idea of the EDT from Swing (and pretty much any modern UI toolkit) into what eventually became Codename One, one of the chief benefits was modal dialogs. Its the ability to block the executing thread in order to ask...
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Keyboard Keys & Android Pipeline
Some features we have in Codename One are a bit hidden behind the surface, we add them as a patch for a developer and don't have the proper place to document them so they get buried. Case in point is the ability in Android to use the search magnifier icon instead of the done button...
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Performance & Map Taps
We neglected to mention in our last post about the new graphics pipeline that it was authored by Steve Hannah who did a splendid job there! He just updated the shaders for the implementation to be far more...
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New Graphics Pipeline
Finally the new graphics pipeline is starting to trickle into the JavaSE port and the iOS port & once we iron those two out it should make its way into the Android port. With this in place we are finally at a point of functionality similar to JavaFX...
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Navigate & Faster Builds
One of the things we've been missing is a simple "navigate" feature that allows you to launch the devices native navigation software with a fixed destination. This was relatively simple to hack together using Display.execute but...
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Webservice Wizard
Simplified webservice access has long been on our todo list and we now finally have a tool that significantly simplifies server communications in Codename One to a method call level. We just posted a How Do I? video for this feature...
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Native iOS Code Callbacks
Writing native code in Codename One is pretty simple, however one piece is relatively vague and that is the ability to call back from native code into the Java code. The reason we left this relatively vague is due to the...
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VM Updates & Webservices
We are making good progress on our new iOS VM and are starting to test a much wider range of apps. The VM is still experimental however many features that didn't work such as native interfaces, build flags...
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Facebook Publish & Android Localization
The Facebook native SDK for iOS and Android is difficult. It layers a great deal of complex permissions and concepts that seem obvious for engineers in Facebook but not so obvious for the casual observer. In the past Facebook allowed you to just request a write permission and you would receive such a permission...
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Try The New iOS VM
We just updated the build servers with the latest version of the Codename One iOS VM. This is still a work in progress and there is no guarantee your application will work. However, you can start playing with this right now and you might enjoy some...
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Badges
iOS allows us to send a push notification to trigger a numeric badge on the application icon, this is something you could do with Codename One for quite some time although it was mostly undocumented. You could send a push notification with the type 100 and the number for the badge and that...
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Changes & Stacks
One of the great features we've added to the new iOS VM is the ability to get proper stack traces without a performance penalty. This is actually pretty easy to implement in a performant way, every entry to a method just registers an integer number representing the method name and class name and...
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Beating The ARC
For the uninitiated, ARC is Apple's term for Automatic Reference Counting. Objective-C uses a reference counting scenario to collect objects which is pretty painful to work with. Personally I preferred C/C++'s manual delete/free to the Objective-C semantics. But a couple of years ago Apple introduced ARC...
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Understanding Peer (native) Components & Why Codename One is so portable
I've had some talks with rather savvy Codename One developers recently which made me realize that quite a few developers don't truly grasp the reason why we have a separation between peer (native) components and Codename One components...
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VM Stats
If you haven't yet filled out the developer economics survey please do so now! We are still short of 30 entries in order to get better logo placement in the released survey...
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Screenshots and Graphics Update
If you read the article about the 7 screenshots of iOS you might have wondered whether you can just supply these screenshots yourself? Well, now you can. Our build server will now generate the screenshots only...
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New VM
You might have noticed things have been a bit quiet with new features recently. That is because we had a bit of a holiday around here and because we spent a great deal of time working on a new VM for iOS...
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Placing
Up until now debugging location oriented applications in the simulator was a bit painful, there was no real way other than coding to a specific location and if you relied on specific GIS...
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Please Help Us By Filling The Developer Economics Survey
The last time we had a developer economics survey you guys really came thru and made us one of the top contributors for that survey! This year the stakes are even higher and the incentive for referrals is greater...
