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Asked: 2024-09-24T22:18:03+05:30 In:

How can I install OpenJDK 21 on my Ubuntu system?

I’ve been trying to get OpenJDK 21 installed on my Ubuntu system, and honestly, I’m kind of stuck. I’m not exactly a Linux wizard, but I make it work for the most part. So, I figured it’s time to upgrade from my old JDK, and I heard that OpenJDK 21 has some cool new features. But the whole installation process is giving me a headache.

I did a bit of digging online, and there are so many different ways to install it—some say to use APT, others suggest adding a PPA or downloading it directly from the OpenJDK website. I tried the APT method first, thinking it would be the simplest route. I opened up the terminal and typed in what I thought were the right commands, but I kept running into dependency issues.

Then, someone in a forum mentioned that the official repositories might not have the latest version yet. I wasn’t sure if I should just wait or try adding a PPA. But then, I got anxious about potential system conflicts. I mean, I’ve read horror stories of people messing up their system configurations, and I really don’t want to be that person.

I also considered downloading the binaries directly. It sounds straightforward enough, but then I started fretting over whether I’d have to set environment variables or mess with PATH settings after. Is that something I’d need to do? It feels like every method has its own pitfalls.

So, here’s my dilemma: what’s the best way to install OpenJDK 21 on Ubuntu without causing too much chaos? If you’ve done it successfully, please walk me through it. Anything that can avoid the “breaking my system” scenario would be a huge relief. I’m all ears for any tips, tricks, or step-by-step guidance you can throw my way. I’m ready to dive in, just need a little push in the right direction!

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    2 Answers






    1. Installing OpenJDK 21 on Ubuntu


      Here’s How You Can Install OpenJDK 21 on Ubuntu

      If you’re looking to install OpenJDK 21 on your Ubuntu system without diving into chaos, here’s a simple way to go about it. Let’s stick with the APT method since it’s usually the easiest and least likely to cause issues!

      Step-by-Step Guide:

      1. Open your terminal. You can do this by searching for "Terminal" in your applications or using the shortcut Ctrl + Alt + T.
  
2. First, let's update your package list to make sure you have the latest info. Run:
   sudo apt update

3. Now, let’s install OpenJDK 21. Run:
   sudo apt install openjdk-21-jdk

4. If you hit any dependency issues during installation, try running:
   sudo apt --fix-broken install
   This command will try to fix any broken dependencies.

5. After the installation completes, you can check if it was successful by typing:
   java -version
   You should see something like “openjdk version '21'...”.

6. Finally, if your system doesn't recognize the `java` command, you might need to set your `JAVA_HOME`. You can do this by adding the following line to your ~/.bashrc or ~/.profile:
   export JAVA_HOME=/usr/lib/jvm/java-21-openjdk-amd64
   Then run:
   source ~/.bashrc
   or source ~/.profile to apply the changes.

      If you still want to use a PPA for the latest version (in case APT doesn’t have it), you can add the PPA like this:

      sudo add-apt-repository ppa:openjdk-r/ppa
sudo apt update
sudo apt install openjdk-21-jdk

      Just be sure to read any prompts carefully and don’t panic! It’s usually safe to proceed when asked about dependencies.

      There you go! Follow these steps, and you should have OpenJDK 21 up and running in no time. Don’t worry too much—just take it step by step, and you’ll be fine!



    2. To install OpenJDK 21 on your Ubuntu system without causing any chaos, the most straightforward way is to use a Personal Package Archive (PPA) that provides the latest version. First, you’ll need to open your terminal and add the PPA by running the command: sudo add-apt-repository ppa:openjdk/ppa. This will enable the latest OpenJDK packages to be accessed. After adding the PPA, update your package list with sudo apt update, and then proceed to install OpenJDK 21 using the command: sudo apt install openjdk-21-jdk. This method minimizes dependency issues as the PPA typically includes all necessary dependencies in the updated packages, ensuring a smoother installation process.

      If you prefer a direct download, you can acquire the binaries from the official OpenJDK website. After downloading, extract the archive and move it to a suitable directory (like /opt/). You will then need to set your environment variables, which involves editing the .bashrc or .profile file in your home directory. Add the following lines: export JAVA_HOME=/opt/jdk-21 and export PATH=$PATH:$JAVA_HOME/bin, replacing /opt/jdk-21 with your specific installation path. Make sure to reload your terminal by running source ~/.bashrc to apply the changes. This method gives you more control, but does require some manual configuration. Choose the method that feels more comfortable for you, and you’ll be on your way to enjoying the new features of OpenJDK 21!


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