how to install java on redhat 9

Java is one of the most essential runtimes for developers, sysadmins, and security professionals. Many enterprise tools and applications require it, and on Red Hat Enterprise Linux 9 (RHEL 9), you can install it easily with a few commands. 

Step 1: Update System Packages

Before installing Java, make sure your RHEL 9 system is fully updated. This ensures compatibility and avoids broken dependencies. Run the following commands:  

sudo dnf update -y
sudo dnf upgrade -y

Keeping your system fresh also gives you the latest stable repositories for Java.

Step 2: Install Java Runtime Environment (JRE)

If you only need Java to run applications, the Java Runtime Environment (JRE) is enough. RHEL 9 provides OpenJDK packages for easy installation:

sudo dnf install java-17-openjdk -y

This will install OpenJDK 17, which is the default and recommended version on Red Hat 9 in 2025.

Step 3: Install Java Development Kit (JDK)

If you plan to compile or develop Java applications, you need the Java Development Kit (JDK). It includes the JRE plus developer tools like javac:

sudo dnf install java-17-openjdk-devel -y

With this package, you’re ready to build and run Java applications on RHEL 9.

Step 4: Verify the Java Installation

After installation, check if Java is installed correctly by verifying the version. Use the following commands:

java -version
javac -version

If both commands return version numbers, Java is successfully installed on your Red Hat Enterprise Linux 9 system.