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Just a quick reminder to participate in the upcoming Java Virtual Developer Day tomorrow or June 25th. More information on my previous post.
We’ve gotten excellent feedback on these releases and have found and fixed a couple of bugs and glitches and made usability enhancements. In keeping with the rapid evolution of the technology, we are today making available a set of refreshed bits:
- Oracle Java ME Embedded 3.3.1 EA for ARM Cortex-M3/M4
- Updated Oracle Java ME Embedded 3.3 EA for Raspberry Pi
- Updated Oracle Java ME SDK 3.3 EA and updated plugins for NetBeans and Eclipse
We have also expanded the documentation that comes with these releases as well as updated the embedded sample code that is available with the Java ME SDK 3.3 EA.
Developer should start using these updated releases right away to benefit from the improvements.
Important Notes For Installation:
- You should update all versions together. The integration between the runtimes (1 and 2) and the tools (3) will work best if all are updated at the same time. So please uninstall previous versions of Java ME SDK 3.3 EA (via Windows “remove software”) and the NetBeans and Eclipse plugins (via plugin management) and then install the updated versions.
- When installing the updated NetBeans plugins, you should use the manual installation method as described in the chapter 2-4 of the “Getting Started Guide for the Windows Platform”. The reason is that the NetBeans update center still contains the plugin versions of Java ME SDK 3.2 GA release (not 3.3 EA).
Be sure to check out the improved and expanded “Getting Started Guides” and “Release Notes” for the platform you plan to use. Refer to the OTN Java Embedded Documentation Tab and expand on the section “Oracle Java ME Embedded 3.3 Release” (see screen shot).
It’s best to start with the Windows (via Java ME SDK) “Getting Started Guide for the Windows Platform”, which explains how to install the Java ME SDK and configure NetBeans and Eclipse.
To access the refreshed bits for the Oracle Java ME Embedded runtimes and the Java ME SDK, please go to the download page (be sure to refer to the section for the 3.3 releases).
Where to Learn More and Get Help:
- Be sure to attend the upcoming Virtual Developer Day – Java (June 19 and 25), which has a dedicated slot on Oracle Java ME Embedded 3.3.
- Check out the full set of documentation, and the videos/webcasts on the Oracle Java ME Embedded 3.3 Resources Page (further links can be found on my blog as well).
- Ask questions on the OTN Java ME Embedded forum.
- Email us at: email@example.com
It will be a packed day of information, from keynotes to technical sessions, demos, and lightning talks – covering Java EE, Java SE, JavaFX, Java ME, and, of course, Java Embedded.
I will be there, talking about “Java in the Internet of Things: Small, Smart, Connected”.
Hope to see you on Tuesday!
JavaOne in Russia ended yesterday, with over 2000 developers attending.
Embedded Java was a a hot topic (as it is pretty much everywhere these days) – check out the video on the Smart Home demo with Java ME Embedded on Raspberry Pi, and catch up with other demos and things happening at JavaOne Russia.
Tomorrow (April 24th) I will be at the JAX Conference in Mainz, Germany for the Embedded Experience Day, talking about “Java in the Internet of Things: Small, Smart, Connected” (at 14:00).
There will also be an “Embedded Werkstatt” (open 10:00-17:00) with different exhibits and demos and the opportunity to ask the experts and discuss embedded topics.
See you tomorrow in Mainz!
Now that a lot of folks are kicking the tires with Java ME Embedded (see the last couple of blog posts), I just wanted to make sure you know where to go with questions:
- Lots of good resources are here and here (including “Getting Started Guides”, FAQ, videos, and API documentation)
- Check out the OTN Java ME Embedded forum and ask questions – our experts are monitoring these regularly
- Email us at: firstname.lastname@example.org - we’ll get back to you
Each platform has its strengths, and your choice depends on your requirements. What’s important is that together, Java ME Embedded and Java SE Embedded cover the embedded space from very small to very large, and give you a single development architecture to build embedded solutions easily and quickly.
For more details, see the below table.
Following up on yesterday’s release, Oracle evangelist Angela Caicedo has put together a great blog posting with all steps and code you need to develop and run your first Java application on an ARM Cortex-M3 developer board.
Or, if you have a Raspberry Pi lying around, you could use that.
In any case, it has never been easier to get started with embedded Java applications!
A few weeks ago, Oracle made available an updated release of Java ME Embedded, version 3.3, as an Early Access (EA) for Linux on Raspberry Pi (see blog entry).
Today, we are following up with the General Availability (GA) on ARM Cortex-M3 for the ARM RTX RTOS on the KEIL MCBSTM32F200 developer board (*see note on Cortex-M4 below).
Why is this important?
With this release, Oracle now provides a Cortex-M3/M4 reference binary of the feature-rich, standards-based Java ME Embedded runtime, scaling from mid-range embedded systems such as Linux-based platforms all the way down to micro controller-type devices with limited memory and small RTOS or minimal kernels. System requirements:
- Minimal Java ME Embedded configuration: 32-bit MCU, 130 KB RAM, 350 KB Flash/ROM
- Full Java ME Embedded configuration: 700 KB RAM, 2000 KB Flash/ROM
Yes, that is Kilobytes, not Megabytes (!)
So take your existing Java skills, use familiar tools like NetBeans and Eclipse, and develop highly-functional, robust embedded applications for a wide range of embedded use cases and devices in a snap.
For example, you can begin developing your code on a powerful and flexible desktop-class system like Raspberry Pi. Later, you take the unmodified application binary and simply deploy it directly to the resource-constrained target devices running Java ME Embedded.
Sounds easy? It is: No cross-compilation, no complexities due to platform dependencies, no dealing different sets of architectures, tools, compilers, libraries, and versions, and significantly reduced integration and testing effort … in fact, many typical embedded software development pain points just evaporate (embedded developers: if you are crying tears of joy now, I understand – I’ve been there myself
And on top of the rich set of functionality already provided by Java ME Embedded 3.2, version 3.3 adds a number of new features, such as an expanded and more flexible access to peripherals (such as ADC, DAC, Pulse Counter, and watchdog), improved logging functionality, tooling enhancements, additional new sample code, and more. Still in the same, low footprint.
Ok, great! What next?
- Watch the brand-new webcast “Getting started with Java ME Embedded on KEIL” (part 1, part 2)
- Order a KEIL MCBSTM32F200 from your favorite distributor (such as Mouser, Element14, or a number of others)
- Review the Java ME Embedded 3.3 documentation, included “Getting Started Guides” and “Release Notes”
- Download the Java ME Embedded 3.3 binary for KEIL MCBSTM32F200 from Oracle Technology Network (OTN)
- Download and install the Java ME SDK 3.3 EA and/or the NetBeans and Eclipse plug-ins
- Check out Angela Caicedo’s blog post ”Getting started with Java ME Embedded on KEIL”
To learn more:
Getting in touch:
- Ask questions on the OTN Java ME Embedded forum
- Email us at: email@example.com
Stay tuned for more to come.
* Note: While the MCBSTM32F200 is the officially supported board, the release also works on the MCBSTM32F400 (which is the Cortex-M4 version)