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Use Eclipse, NetBeans or IDEA to build native mobile apps using the cloud.Java Cloud
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Codename One powers more than 50M devices; it's used by Fortune 500's, banks & governments worldwide!
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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Codename One Graphics Part 2: Drawing an Analog Clock
The Graphics class has included limited support for 2D transformations for some time now including scaling, rotation, and translation...
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Web App Build Target
In the past we made several attempts at compiling Codename One applications to webapps, these were only partially successful. On the surface this seems relatively simple...
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Location, iOS Beta Testing & Better Input
In recent versions of iOS Apple added the ability to distribute beta versions of your application to beta testers using tools they got from the testflight acquisition...
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Codename One Graphics
This is the first in a series of posts about drawing graphics in Codename One. In this tutorial, we will create a rudimentary drawing app to demonstrate how to use the Shape API...
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Dr. Sbaitso Coming To Riga
I'll be speaking at Riga Dev Day next week and I've been working on a demo for the conference. Back in my teen years I bought the SoundBlaster 1.0 which was one of the first affordable soundcards for the PC...
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The toArray(new Array) Antipattern
A recent issue in the issue tracker on the new iOS VM reminded me of a serious pet peeve and big design mistake in the Java Collections API, something that is just unfixable and wrong yet appears often in code from developers trying to be clever...
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Game On
A Codename One community member Antonio Mannucci offered to release a gaming API that he created a while back. It took him some time but he finally delivered on his promise by releasing a cn1lib for simple 2D games in Codename One and a demo game to go with it...
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Cats in Toolbars
Chen spent some time working on some Toolbar effects such as the rich title areas made popular by social network apps such as G+ & Twitter...
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Happy New Year - Looking Back & Forward
We are closing 2014 which has been a pretty eventful year for us where we finally solidified Codename One, looking into 2015 we have a lot of great plans ahead...
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Stabilizing The New VM
Its always a challenge to migrate to a new implementation and the new VM is no exception, we ran into several issues and are already hard at work fixing them...
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New Codename One iOS VM Is Now The Default
New builds sent for iOS will now use the new iOS VM by default, this will deliver a lot of new features: stack traces, 64 bit, xcode 6+ support, iPhone 6/6+ native resolution, no stall GC etc...
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Toolbar
One of the common requests we get from users is more customization for the title bar area with more flexibility e.g. placing a TextField for search or buttons in various ways...
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Lollipop Take 2 & iOS VM Stability
Our previous attempt at getting the new Lollipop behavior on Android OS 5 didn't go as well as we had hoped. While we can't find any device that failed we got a lot of community reports of...
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JSON To Pojo Mapping
While the webservice wizard in Codename One is pretty useful for many things it still requires a proxy and Servlet container which might not be the right choice for everyone...
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Continuous Integration
Building enterprise mobile apps can be pretty challenging especially when dealing with rapid changes, prototyping and corporate development requirements...
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Round At Codemotion
I've had a lovely time giving a demo of Codename One at Codemotion Tel Aviv, one of the things that surprised me about the conference is that the sessions are so short (40 minutes) which...
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SMS & Custom Commands
One of the problems in cross platform development is availability of functionality on one platform that is missing on another. Case in point sending an SMS message. Android, RIM & J2ME support sending SMS's in the background...
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Static Garbage & Lollipop
As we wrote before our new Garbage Collector is designed for amazing speed an never locks, this worked really well for most cases but we started running into weird crashes that took us deep into...
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Don't Block The UI
I've talked with many end users about their badly written apps grievances and I've come to the conclusion that it isn't a matter of native vs. cross platform or even HTML. Its a frustration issue, driven by unintuitive apps (hidden gestures etc.) and slow performance...
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CallSerially The EDT & InvokeAndBlock (Part 2)
The last time we talked about the EDT we covered some of the basic ideas, such as call serially etc. We left out two major concepts that are somewhat more advanced...
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Side Swipe
Chen's been busy with some customers on a feature that is often requested: mailbox like swipes. This effectively allows you to swipe a component to the side in order to reveal capabilities underneath e.g. edit, delete etc...
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Admob Interstitial Ads & Supertabs
Ram (the developer of yhomework), wanted to improve his ad revenue on Android/iOS thru interstitial (full screen) ads and integrated those using native interfaces...
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Mighty Morphing Components
One of the nice effects in the Android material design is the morphing effect where an element from the previous form (activity) animates to become a different component on...
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64 bit & OSS VM
Apple Just announced they will mandate 64 bit for all new submissions starting February 2015, luckily we are very prepared for that and we already support 64 bit builds in our new VM.
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CallSerially The EDT & InvokeAndBlock (Part 1)
We last explained some of the concepts behind the EDT in 2008 so its high time we wrote about it again, there is a section about it in the developer guide as well as in the courses on Udemy but since this...
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Migrating To Androids In-App-Purchase 3.0
Google announced a couple of weeks ago that Android's In App Purchase 2.x API will be retired soon and all code should be migrated to version 3.0 of...
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JavaOne Booth, iOS 8 Issues & More
I just published a LinkedIn article discussing the financials of a JavaOne booth, if you are a startup/vendor looking at conference booths I hope this provides some much needed...
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CN1ML & JavaOne
This is going to be a radically different trip report, we weren’t just talking at Java One this year we were actually presenting with our own booth...
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CN1ML & JavaOne
Shortly after introducing Mirah support for Codename One, Steve is back with something that is arguably even more impressive. Over the weekend Steve released a tool called CN1ML which is an HTML subset markup language that allows you to effectively...
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Second Annual Wristband Donation For Oracle Employees
At JavaOne/Oracle Open World the wristband allows you to attend the "appreciation event" featuring Aerosmith, Macklemore & Ryan Lewis and Spacehog. Unfortunately Oracle employees don't get the wristband that allows everyone to attend that event...
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IOS 8 Installs & Customizing the Pull To Refresh
One of our pro users alerted us to an issue with iOS 8 that might trigger a case where apps can't be installed OTA (Over the air, via QR or email links) and only installed via itunes...
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JavaZone Trip Report
JavaZone is winding down as I'm starting to write this although I'll probably post this after the videos are up to reference some of the interesting sessions I saw. Unfortunately JavaZone doesn't post workshop videos so my workshop...
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8 to 6+
iOS 8 and iPhone 6/6+ are nearly upon us and Codename One is ready for both! We've just added device skins for iOS 6 and 6+, notice that due to the very high resolution you might want to disable scrolling. Notice that those skins...
