Chapter 4. Updating OpenJDK 17 on Red Hat Enterprise Linux

Procedure

1. Check the current OpenJDK version:

   $ sudo yum list installed "java*"

   A list of installed OpenJDK packages displays.

   Installed Packages
   
   java-1.8.0-openjdk.x86_64    1:1.8.0.322.b06-2.el8_5    @rhel-8-for-x86_64-appstream-rpms
   java-11-openjdk.x86_64    1:11.0.14.0.9-2.el8_5    @rhel-8-for-x86_64-appstream-rpms
   java-17-openjdk.x86_64    1:17.0.2.0.8-4.el8_5    @rhel-8-for-x86_64-appstream-rpms

2. Update a specific package. For example:

   $ sudo yum update java-17-openjdk

3. Verify that the update worked by checking the current OpenJDK versions:

   $ java -version
   
   openjdk version "17.0.2" 2022-01-18 LTS
   OpenJDK Runtime Environment 21.9 (build 17.0.2+8-LTS)
   OpenJDK 64-Bit Server VM 21.9 (build 17.0.2+8-LTS, mixed mode, sharing)

   Note

   You can install multiple major versions of OpenJDK on your local system. If you need to switch from one major version to another major version, issue the following command in your command-line interface (CLI) and then follow the onscreen prompts:

   $ sudo update-alternatives --config 'java'

Procedure

1. Remove the existing symbolic link of the generic path to your JDK or JRE.

   For example:

   $ unlink ~/jdks/java-17

2. Install the latest version of the JDK or JRE in your installation location.