Can't execute java program on Raspberry Pi on startup

Question

I use a Raspberry Pi 3 Model B with Raspbian Jessie.

I have a java program that I want to compile and run on start-up. I figured I need to launch it through /etc/rc.local. I have a command to compile the java-files and one command to run them.

sudo javac -cp /home/pi/Desktop/MultiSensor_v2.0_Java/opencv-3.2.0-java/build/bin/ .jar /home/pi/Desktop/MultiSensor_v2.0_Java/ .java

sudo java -Djava.library.path="/home/pi/Desktop/MultiSensor_v2.0_Java/opencv-3.2.0-java/build/lib" -cp "/home/pi/Desktop/MultiSensor_v2.0_Java/opencv-3.2.0-java/build/bin/opencv-320.jar:/home/pi/Desktop/MultiSensor_v2.0_Java/" Main &

When I run these commands from the terminal it works perfectly. I tried to put these commands in the /etc/rc.local file before exit 0. On reboot, the compilation works but the actual program never executes. How do I get my java program to run upon startup using the two commands above?

Answer 1

I had this problem, too. I solved it with the following workaround: I created a shell-script that runs the java programm. Then I called the shell-script on startup.

Answer 2

I managed to solve it by doing a bash-script as @ILikeCOding said, but I had to change the location from were it was called.

I moved the bash-script to the root directory and edited the autostart script located in:

/home/pi/.config/lxsession/LXDE-pi/autostart

In that file, I added a line to launch my script. I think this works because the autostart-script launches when you log into your user and not on boot, therefore the program can launch properly. Not sure if that's the case, but it works so I'm happy.