How to update Java on Windows and Linux (2025)

Java is a popular programming language used in many different applications and systems around the world. To ensure optimal performance, security and compatibility, it's crucial that you keep your Java installation up-to-date. In this article, we look at why this is important and how to easily update Java on both Windows and Linux.

Why is it important to keep Java up to date?

Safety and security

Java updates often contain important security patches that protect your computer from hackers and malware. By keeping Java up to date, you minimize the risk of security holes that could lead to your system being compromised.

Performance

The latest Java versions contain improvements that can increase the speed and stability of your applications. This can help improve the user experience and efficiency of the programs you use.

Compatibility

Updates ensure compatibility with the latest technologies and standards. This means you avoid issues when using newer software or upgrading existing applications.

How to update Java on Windows

1. Open your web browser and go to Java's official website.
2. Click on the button "Get Java now" to download the installation file.
3. Once the file is downloaded, double-click on it and follow the on-screen instructions to complete the installation.
4. After the installation is complete, it is recommended to restart your computer to properly activate the new Java version.
5. Confirm the installation by visiting https://www.java.com/verify. If the installation was successful, you will get a confirmation message.

How to update Java on Linux

1. Open a terminal by pressing Ctrl + Alt + T or search for "terminal" in the menu.
2. Update your packing list by entering:

   sudo apt-get update

3. Install the latest OpenJDK version with:

   sudo apt-get install openjdk-17-jdk

   Replace the number (e.g. 17) with the latest version. Check the latest version at OpenJDK's website.
4. Edit the JAVA_HOME environment variable by opening the file .bashrc:

   nano ~/.bashrc

5. Add the following line at the bottom of the file:

   export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64

   Replace the version number with the installed Java version.
6. Save the file (Ctrl + O) and close the text editor (Ctrl + X).
7. Apply the changes by reloading the file:

   source ~/.bashrc

8. Verify the Java version with:

   java -version

MI Support Servicedesk

Our service desk helps ensure that your systems and clients always have the latest Java version installed. Contact us for professional assistance.

FAQ - Frequently asked questions

How often should I update Java?

It is recommended to check for updates at least once a month as security patches and updates are released regularly.

How do I know which Java version I have?

You can check your Java version by opening the terminal and entering java -version. On Windows, you can also find the Java version in the control panel under Java.

Is Java free?

OpenJDK, which is the most common Java version, is free and open source. Oracle also offers Java SE with certain license restrictions.

What do I do if I experience problems after updating Java?

If you experience issues after an update, it may be due to incompatibility with existing software. Contact the software manufacturer's support or try reinstalling the Java version.

Can I have multiple Java versions installed?

Yes, it is possible to have multiple Java versions installed on the same computer. Make sure you manage the JAVA_HOME environment variable correctly so that you use the desired version.