How to run javafx with Raspberry Pi Posted on 2020/07/12

Perhaps quite a lot of people are looking for a way to run JAVA FX on Raspberry Pi, but since there is little information in Japanese, I will omit it here.

The following articles are the most interesting when searching with Google teacher. https://qiita.com/sh1k1ya/items/72d40e6ef8b8cd51e68c "Try combining JavaFX and GPIO control on Raspberry Pi ... but not yet completed orz"

I used it as a reference, but it didn't work.

Development tool uses Eclipse The method of introducing JAVAFX in Eclipse and developing it is left to other sites.
What you want to do
〇Introduce samba to Raspberry Pi and build a cross development environment with eclipse on windows For windows10 you also need to enable the samba client programmatically and features 〇 Automatically execute the executable jar edited by Scene Builder


Execution procedure abbreviation

  1. Write the Raspbian OS image to the SD card
  2. Initial setting
  3. Wireless LAN settings
  4. Install samba

$/sudo apt-get install samaba

  1. Edit smb.conf

sudo nano /etc/samba/smb.conf

Added to the last line

[raspberry_pi] comment = Share path = /home/pi/samba public = yes read only = no browsable = yes force user = pi

6. Create a samba folder in / home / pi

$ sudo mkdir /home/pi/samba

7. Service start * It will be started automatically when Raspberry Pi starts next time.  

$ sudo systemctl restart smbd

  1. Javafx placement ・ Https://openjfx.io/ -Download JavaFX armv6hf SDK and unzip ZIP -Place the unzipped files in the samba folder ・ Right-click armv6hf-sdk to open it on the terminal ・ Permission confirmation -Pass the path * The javaFX so file can be executed by passing the path

    \$ export PATH="$PATH:/home/pi/samba/armv6hf-sdk"

・ Check the path

/$ echo PATH

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/games:/usr/games:/home/pi/samba/armv6hf-sdk

  1. Place an executable jar containing the appropriate JAVAFX in samba (Example) ・ You can execute it by entering the following on the command line.

$ java --module-path /home/pi/samba/armv6hf-sdk/lib --add-modules=javafx.controls,javafx.fxml -jar /home/pi/samaba/test.jar

How to create a javaFX project in Eclipse 1. javaFX --Create a javaFX project 2. Enter the project name 3. Place the user library JAVAFX11 by adding the library 4. Set the native live library location of JAVAFX11 (Example) C: \ javafx-sdk-11.0.2 \ bin 5. Select FXML as the declarative UI language Change the name etc. as appropriate 6. Done 7. Edit XXX.fxml with Scene Builder Put the code in XXXXController.java 8. Execution environment h uses java8. You may use java13, but you need to declare modularization in the command line arguments. 9. Create an executable jar User library JAVAFX11 needs to be packaged 10. Place it in / home / pi / samba and grant execution authority * Output directly to the folder on the Raspberry Pi side shared by samba 11. Below, test execution according to the example

$ java --module-path /home/pi/samba/armv6hf-sdk/lib --add-modules=javafx.controls,javafx.fxml -jar /home/pi/samaba/test.jar

12. Auto start settings

Execute the following command to copy the template of the autostart file to the config of your home directory.

$ mkdir -p ~/.config/lxsession/LXDE-pi $ cp /etc/xdg/lxsession/LXDE-pi/autostart ~/.config/lxsession/LXDE-pi/

  1. Edit autostart

$ sudo nano ~/.config/lxsession/LXDE-pi/autostart

Added to the end of the configuration file

@java --module-path /home/pi/samba/armv6hf-sdk/lib --add-modules=javafx.controls,javafx.fxml -jar /home/pi/samaba/test.jar

  14. Reboot and confirm automatic startup

Finally The point is to pass the path to the location of the JavaFX * .so file and put the modularization argument at runtime.

With this method, the media player gets an exception and doesn't work. Is ffmpeg not installed? I'm not sure If it goes well, I will write it again

2020/7/14

I found another way to run JAVAFX, so I will describe it You can install bellsoft's JDK with the following command and switch with sudo update-alternatives It took me a long time to find the above method ..... Orz ...

cd /home/pi wget https://download.bell-sw.com/java/13/bellsoft-jdk13-linux-arm32-vfp-hflt.deb sudo apt-get install ./bellsoft-jdk13-linux-arm32-vfp-hflt.deb sudo update-alternatives --config javac sudo update-alternatives --config java

MP3 cannot be played with javafx of Raspberry Pi for some reason. Must be converted to wav before use This is also the reason why the media player gave an exception by the above method .... orz.orz ... I used the free RealPlayer for the conversion. Advertising is annoying ..

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