Exporting a Runnable Jar from Eclipse
You can create a runnable jar file from an Eclipse project that contains all files necessary to run an application.
- Select File / Export…
- Select Java / Runnable JAR file
The export wizard opens:
- Select the launch configuration that you want to export. Such a launch configuration is created automatically if you have built the project with Reactive Blocks.
- Select the name of the jar file that should be created. Make sure it ends with *.jar.
- Select the first option for library handling.
- Click Finish.
- Ignore possible warnings during the export.
- It’s easy to select the wrong launch configuration, since you may have several runnable applications in your workspace.
- Whenever you export a new version of an application, change the file name of the jar file. You can, for instance, append a number that you increase with each version. When different versions of a jar file have the same name it is very easy to mess up things and to accidentally run an outdated version. So, never produce a jar file with the exact same name!
It is easiest to pack a Java program as an runnable jar file, copy that jar file to the Pi, and then run it. To start the Java program, use the java command:
sudo java -jar
sudo to run it as super user. This is necessary for some programs, especially those that access the GPIO pins.
Terminating a Java Program
To terminate a running Java program from within the same terminal where you started it, press the buttons
c at the same time. This should stops the currently executing program. If that does not work, try
You can also open another terminal, and then run the following command:
ps -ef | grep java
You will see a list of processes that have java in their name. Find the proper process, and copy its process number.
sudo kill <process-number>
You can also use
sudo killall java