@Luis,

It sounds like there might be an issue with the Java setup on your system. Even though Java is installed, sometimes Ubuntu requires additional configurations to recognize .jar files.

Here are a few troubleshooting steps you could try:

1. Run sudo update-alternatives --config java to ensure the correct Java version is set as the default.

2. Use java -jar /path/to/yourfile.jar in the terminal to launch the .jar file. This should work if Java is properly configured.

3. If you haven’t already, try installing OpenJDK (e.g., sudo apt install openjdk-17-jdk) to make sure Ubuntu has all the necessary Java components.

Let me know if this helps, or if you’re seeing any specific error messages!”

Ubuntu 24.04 no longer supports running .jar files directly. This option is no longer available in the graphical interface, nor is it possible to run Java programs from the command line.

Java is installed correctly, as confirmed by running the javac -version and java -version commands.

I am having issue. After adding the line JAVA_Home.

$ source /etc/environment

bash: /etc/environment: line 2: unexpected EOF while looking for matching `”‘

bash: /etc/environment: line 3: syntax error: unexpected end of file