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How To Run JNLP Files on Ubuntu 20.04 with Java 1.8

Ubuntu 6

In this article, we will guide you through the process of running JNLP (Java Network Launching Protocol) files on Ubuntu 20.04 with Java 1.8. JNLP is a protocol used by Java Web Start (JWS) for the distribution and execution of Java applications or applets over a network.

Quick Answer

To run JNLP files on Ubuntu 20.04 with Java 1.8, you need to install the icedtea-netx package and use the javaws command to execute the JNLP file.

Prerequisites

Before we begin, ensure that you have:

  • Ubuntu 20.04 installed on your system.
  • Access to a terminal window/command line (Ctrl+Alt+T).
  • Superuser (sudo) privileges.

Installing IcedTea-Netx

To run JNLP files, we need to install a package called icedtea-netx which provides the javaws command. Here’s how you can install it:

  1. Open your terminal.
  2. Run the following command to update your package list:
sudo apt update

This command fetches the latest updates of all packages from the Ubuntu repository.

  1. Next, install the icedtea-netx package by running:
sudo apt install icedtea-netx

In case the above command doesn’t work, try installing the icedtea-netx-common and icedtea-plugin packages:

sudo apt install icedtea-netx-common icedtea-plugin

Running JNLP Files

After the successful installation of the necessary packages, you can now run JNLP files. Here’s how:

  1. Navigate to the directory containing the JNLP file using the cd command. For example:
cd /path/to/your/file
  1. Run the JNLP file using the javaws command:
javaws yourfile.jnlp

Replace yourfile.jnlp with the name of your JNLP file.

Troubleshooting

If you encounter any issues during the installation or execution, running the following commands can help in troubleshooting:

update-java-alternatives -l
which javaws

The update-java-alternatives -l command lists the installed Java alternatives. The which javaws command displays the path of the javaws executable.

Conclusion

Running JNLP files on Ubuntu 20.04 with Java 1.8 is a straightforward process. It involves installing the necessary packages and executing the JNLP file using the javaws command. If you encounter any issues, don’t hesitate to use the troubleshooting commands to diagnose the problem. Remember to replace yourfile.jnlp with the actual name of your JNLP file in the javaws command. Happy coding!

What is JNLP?

JNLP stands for Java Network Launching Protocol. It is a protocol used by Java Web Start (JWS) for the distribution and execution of Java applications or applets over a network.

What is Ubuntu 20.04?

Ubuntu 20.04 is a Linux-based operating system. It is the latest long-term support (LTS) release of Ubuntu, which means it will receive updates and support for a longer period of time.

What is Java 1.8?

Java 1.8, also known as Java 8, is a version of the Java programming language. It introduced several new features and improvements, including lambda expressions, functional interfaces, and the Stream API.

Why do I need to install IcedTea-Netx?

IcedTea-Netx is required to run JNLP files as it provides the javaws command, which is used to launch Java Web Start applications. Installing IcedTea-Netx ensures that you have the necessary tools to run JNLP files on Ubuntu 20.04.

How do I update my package list in Ubuntu?

To update your package list in Ubuntu, you can use the sudo apt update command. This command fetches the latest updates of all packages from the Ubuntu repository.

Can I use a different version of Java to run JNLP files?

Yes, you can use a different version of Java to run JNLP files. However, the instructions provided in this article are specifically for Java 1.8. If you have a different version of Java installed, you may need to adjust the commands accordingly.

How do I navigate to the directory containing the JNLP file?

To navigate to the directory containing the JNLP file, you can use the cd command followed by the path to the directory. For example, if your JNLP file is located in the /path/to/your/file directory, you would run cd /path/to/your/file.

What should I do if the `javaws` command is not found?

If the javaws command is not found, it may be because the icedtea-netx package is not installed correctly. You can try reinstalling the package by running sudo apt install --reinstall icedtea-netx. If the issue persists, you may need to check your Java installation and ensure that it is properly configured.

How can I check which version of Java is installed on my system?

You can check which version of Java is installed on your system by running the java -version command in the terminal. This will display the version information of the installed Java runtime environment.

Can I run JNLP files on other operating systems?

Yes, JNLP files can be run on other operating systems as well, not just Ubuntu 20.04. The process may vary slightly depending on the operating system, but the basic steps remain the same – installing the necessary packages and using the appropriate command to run the JNLP file.

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