How to Install Oracle JDK 9 on CentOS Easy Guide

Oracle JDK 9 Quick Start for CentOS

Hi! This shows you Step-by-step How to Install and Getting-Started with the Oracle-Sun Official Java SE JDK 9 ON CentOS 6.x/7.x/8.x/8-Stream/9-Stream i686/x8664 GNU/Linux Desktop/Server.

To SetUp Oracle JDK you will need to Use the update-alternatives Tool to Update your System Java to 1.9 JDK 9.

The Powerful Java 9 New Features:.

• Java REPL Shell jshell
• Full support for HTTP 2.0, new HTTP client that implement HTTP 2.0 and websockets
• Java Microbenchmarking Harness
• Java Process API Boost
• Debugging in Production

Moreover, to Make the Process Easier to Visualize the Post Includes the Basic Screenshots of the Steps Involved.

1. Open a Shell Terminal emulator window
   (Press “Enter” to Execute Commands)

   

   In case first see: Terminal QuickStart Guide.

2. Download Oracle Java SE JDK 9 for Linux.

   Oracle JDK 9 i586/x8664 tar.gz

   Oracle JDK 9

3. Double-Click on the tar.gz Archive and Extract into /tmp
   Or from Shell:

   tar xvzf ~/Downloads/jdk-9*.tar.gz -C /tmp/

   

4. Relocate Java JDK 9.

   sudo su

   If Got “User is Not in Sudoers file” then see: How to Enable sudo
   Make a java Directory if Not already there with

   if [ ! -d "/usr/java" ]; then mkdir /usr/java; fi

   Set the root superUser as owner:

   sudo chown -R root:root /tmp/jdk-9

   Reiterate the Execution Permission over the Java binaries:

   chmod -R +x /tmp/jdk-9/bin

   Finally, Shift the Java contents with:

   mv /tmp/jdk-9 /usr/java/

5. Setup Oracle Java JDK 9.

   update-alternatives --install /usr/bin/java java /usr/java/jdk1.9*/bin/java 1065
   

   update-alternatives --install /usr/bin/javac javac /usr/java/jdk1.9*/bin/javac 1065
   

   update-alternatives --install /usr/bin/jar jar /usr/java/jdk1.9*/bin/jar 1065
   

   update-alternatives --install /usr/bin/javaws javaws /usr/java/jdk1.9*/bin/javaws 1065
   

   Checking or Setting the System Java Version in Use with

   update-alternatives --config java
   

   To Switch of Java Version Just Enter the Selection Number on First, Column. :)

6. Setting JAVA_HOME User Environment Variable (Optional).

   su [myUserName]

   Or simply:

   exit

   And Edit the Bash environment Configuration file

   nano $HOME/.bashrc

   Append:

   export JAVA_HOME=/usr/lib/jvm/jdk1.9[uX]

   Replace the [uX] Looking for the Installed Java 9 Version with:

   ls /usr/java

   Ctrl+x to Save & Exit from nano Editor :)
   Load New Bash Config:

   bash

7. Test New Java JDK 9 Installation.

   java -version

Now Thanks to Oracle-Sun Corporation you are able to Successfully Start Up with Java 9 Development.

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