Embedded Java8 and Netbeans

xwalter

I use java 8 and Netbeans to develop with my orange pi plus 2
Following this istructions I hope you get help .
First of all you have to update and upgrade your system by typing

1. 
   
2. sudo apt-get update
   
3. sudo apt-get upgrade
   

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Download the embedded java 8 jdk from Oracle at  http://www.oracle.com/technetwor ... nloads-2133151.html
Select jdk-1.8.0_73-linux-arm32-vfp-hflt.tar.gz and download it into Downloads folder
Move the terminal in this folder and type

1. 
   
2. sudo tar zxvf jdk-8u73-linux-arm32-vfp-hflt.tar.gz -C /opt
   

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Set default java and javac to the new installed jdk8.

1. 
   
2. sudo update-alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_73/bin/javac 1
   
3. sudo update-alternatives --install /usr/bin/java java /opt/jdk1.8.0_73/bin/java 1
   

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And then

1. sudo update-alternatives --config javac
   
2. sudo update-alternatives --config java
   

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After all, verify with the commands with -version option.

1. java -version
   
2. javac -version
   

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Now you can download and install Netbeans 8 as well , to this link https://netbeans.org/downloads/index.html
Download the complete version with Platform  " OS indipendent zip"
Navigate to Download folder again and unzip the netbeans.8.1.xxxxx.zip  file .
Navigate until ...../home/orangepi/<yournetbeansfolder>/bin
Give the permission and the file executable with

1. chmod +x netbeans
   

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After that ,to run Netbeans you have to type

1. ./netbeans
   

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Then you can install modules and plugin for several language such C/C++, PHP and java of course
It's working well .
ciao
Walter

xwalter

Carry on and let's use the serial port of our orangepi .
After install java jdk 8 and Netbeans and both working , now we want to use the serial port
First of all .....

1. sudo apt-get install librxtx-java

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This will install the tool and you will find the RXTXcomm.jar into  /usr/share/java
You have to add this library in Netbeans as external jar/folder
But for the runtime it needs also a .so file which is the same like .dll in windows .
so=shared object , is a dinamically library used at runtime which connects itself to the device driver.
After many nightmares and troubles I have found the best solution for that .
After the installation of the library you will also find  into  /usr/lib/jni a lot of .so files but what you are interested is the librxtxSerial.so.
The problem is that Netbeans search this .so file somewhere like java.library.path and I didn't solve these issues. But I solved int his way ....
In Netbeans , right click above your project (in the tree at left) and select
-> Properties -> Run -> VM Options  (is a richtext box ) and to add this line

1. -Djava.library.path="/usr/lib/jni/"

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Click ok and go out and all is done.
Now if you run your project everythings  are ok .
Here you can find a complete project which uses the serial port by using threading technique as well.
http://rxtx.qbang.org/wiki/index ... ith_the_serial_port
ciao

xwalter

In these two videos I show what I did
https://youtu.be/53ehI1FFKsM?lis ... t-xbKrCBU3QIe9MEXw_
https://youtu.be/q5HPKug3ZS0?lis ... t-xbKrCBU3QIe9MEXw_

xwalter

now the problem is how to unlock the  ttyS0 in the system.
I'm trying with gtkterm , minicom and else but nothing to do
The serial port of orangepi is sleeping , it doesn't receive and it doesnt'show me anything on the screen .
Where to find the file and set "I Want to use my serial port "

xwalter

ok it works

xwalter

Communication between orange pi and Visual Studio 2015 over the serial port https://youtu.be/Vz00VZiCzcY

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emmaorabelle

Thank you for sharing the instructions for setting up Java 8 and Netbeans on an Orange Pi Plus 2. These steps provide a helpful guide for developers using this platform. By following these instructions, users can update their system, download and install the Java 8 JDK, set the default Java and javac versions, and install Netbeans 8. Dave The Diver

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