Install Java 17 (OpenJDK 17) on Oracle Linux 8

CloudSpinx
December 17, 2024
6:02 am
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In our today’s guide, we are going to look at how to install Java 17 (OpenJDK 17) on Oracle Linux. What is java and what is it used for? Java is a programming language and a computing platform. You will find many powerful Enterprise applications written in Java. It is also required in our computers in order for some applications to run. Android applications are basically build with Java.

OpenJDK is the Java development environment. It is free to download and install. JDK 17 is the open-source reference implementation of version 17 of the Java SE Platform as specified by JSR 389. A significant number of Java Enhancement Proposals (JEPs) have been released in version 17 as listed below:

Restore Always-Strict Floating-Point Semantics
macOS/AArch64 Port
Enhanced Pseudo-Random Number Generators
New macOS Rendering Pipeline
Strongly Encapsulate JDK Internals
Deprecate the Applet API for Removal
Context-Specific Deserialization Filters
Pattern Matching for switch (Preview)
Remove RMI Activation
Remove the Experimental AOT and JIT Compiler
Sealed Classes
Foreign Function & Memory API (Incubator)
Deprecate the Security Manager for Removal
Vector API (Second Incubator)

Option 1: Install OpenJDK 17 on Oracle Linux 8

You can install OpenJDK 17 from OS default repositories.

sudo yum install java-17-openjdk java-17-openjdk-devel

After the installation confirm Java version.

$ java -version
java version "17.0.12" 2024-07-16 LTS
Java(TM) SE Runtime Environment (build 17.0.12+8-LTS-286)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.12+8-LTS-286, mixed mode, sharing)

Option 2: Install Java SE 17 on Oracle Linux 8

If you wish to install Java SE Development Kit 17 instead, go ahead to download RPM package for Oracle Linux 8 from Oracle java download page. Download the rpm :

wget https://download.oracle.com/java/17/latest/jdk-17_linux-x64_bin.rpm

Then install it by running the below commands:

sudo rpm -Uvh jdk-17_linux-x64_bin.rpm

Now confirm Java installed version.

$ java -version
warning: jdk-17_linux-x64_bin.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:jdk-17-2000:17-ga                ################################# [100%]

Configure Java environment.

sudo tee /etc/profile.d/jdk.sh <<EOF
export JAVA_HOME=/usr/java/default
export PATH=\$PATH:\$JAVA_HOME/bin
EOF

To use Java Home, source the file.

source /etc/profile.d/jdk.sh

Test Java Installation

To test our Java installation, let us create a simple html file. Create a file test.java with the content as shown below:

$ vi HelloWorld.java
public class HelloWorld {
	public static  void main(String[] args) {
	System.out.println(“Hello, world”);
	}
}

Compile Java code.

java HelloWorld.java

Now run your java program.

$ java HelloWorld
Hello, world

Set default Java Version

Run the command below to choose your default java version.

sudo alternatives –config java

Key in the number for your chosen version and press Enter

There is 1 program that provides 'java'.

  Selection    Command
-----------------------------------------------
*+ 1           /usr/java/jdk-17/bin/java

Enter to keep the current selection[+], or type selection number:

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