Error on Device Access API class/interface import

1973768

Hi,

I have followed https://apex.oracle.com/pls/apex/f?p=44785:141:128148408213710::::P141_PAGE_ID,P141_SECTION_ID:144,1032#prettyPhoto/1/ video tutorial to set up Java ME Embedded development environment in my Windows system and I have chosen Raspberry PI as embedded platform for ME applications.

I thought of experimenting on Pi’s GPIO header to control a LED through a Switch. But import statement for com.oracle.deviceaccess.PeripheralConfig is giving error in NetBeans IDE and there is no Java ME library containing this interface in the ME SDK installation directory so that I can include that in project classpath to get rid of this error.

Where can I download the JAR for Device Access API?

 

Please suggest…

Thank you.

Alexander.Belokrylov-Oracle

It looks like you are referring to the Early Access version of Java ME Embedded 8.  The Device Access API in the final version of Java ME 8 was enhanced and the best place to get an information on our platform is Oracle Docs portal http://docs.oracle.com/javame/8.0/index.html. For GPIO led blinking for instance you can use the following example: General Purpose Input/Output

You also welcome to follow our blog: https://blogs.oracle.com/javame/

Alexander.Belokrylov-Oracle

Do not forget about API Permissions as you will be ready to run your code on Raspberry Pi Security

1973768

Thank you for your reply.

I could successfully execute ‘blinking LED’ application on Raspberry PI, I have done this using DeviceManager class, GPIOPin interface present in device-io_1.0.jar which has come with ME SDK installation (C:\Java_ME_platform_SDK_8.0\lib).

But https://apex.oracle.com/pls/apex/f?p=44785:141:10585690084130::::P141_PAGE_ID,P141_SECTION_ID:144,1033#prettyPhoto/2/ demonstrates the same application by using classes and interfaces present in com.oracle.deviceaccess package (for eg, com.oracle.deviceaccess.PeripheralManager, com.oracle.deviceaccess.gpio.GPIOPin) and the import on the same is not working in my IDE (compile time error).

I have used below software installers in a Windows7 system for development environment set up:

Java SE SDK: jdk-8u11-windows-x64.exe

Java ME SDK: oracle-jmesdk-8-0-rr-win32-bin.exe

NetBeans all-in-one bundle: netbeans-8.0-windows.exe

NetBeans plugins for Java ME: oracle-jmesdk-8-0-rr-nb-plugins.zip

I have used only above installers.Have I missed anything during development environment setup??

Please suggest further…

Thanks

Alexander.Belokrylov-Oracle

The video you referred to created before the final release of Java ME 8 and used proposed API which have been changed in final version. You do not have com.oracle.deviceaccess package in Java ME 8 GA. Please use jdk.dio instead.

1973768

So, com.oracle.deviceaccess package was available only with previous releases of Java ME (for eg, Java ME 3.3 or 3.4) and with the latest release of Java ME 8.0 or later version the device access APIs are available under jdk.dio package. Is this conclusion correct??

Please clarify…

Thanks.

Alexander.Belokrylov-Oracle

Exactly

1973768

Thank you for clarifying my doubt on relationship between Device Access APIs under com.oracle.deviceaccess and jdk.dio

Alexander.Belokrylov-Oracle

Your welcome and happy coding with Java ME Embedded. You actually can mark the question as "Answered".