How to Install Oracle JDK 9 on LXLE 18.04 Easy Guide

Install Oracle JDK 9 LXLE 18.04

Hello LXLE User! How to Download and Install Oracle JDK 9 on LXLE 18.04 desktops.

And to SetUp Oracle JDK 9 for LXLE you will need to Use the update-alternatives Tool to Update your System Java to 1.9 JDK9.

Moreover, Java SE 9 includes much awaited New Features like the Modularization of the Java Platform, Better Performance, Support for New Standards, and many other improvements.

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

The Contents and Details of Oracle JDK 9 on LXLE Install are expressly minimal to focus only on the essential instructions and commands and make the tut easier to understand ;)

1. Open a Shell Terminal emulator window
   Ctrl+Alt+t on desktop
   (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 jvm Directory if Not already there with

   if [ ! -d "/usr/lib/jvm" ]; then mkdir /usr/lib/jvm; 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/lib/jvm/

5. Installing Oracle Java JDK 9
   You can directly Copy & Paste the Commands into Terminal..

   update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-9/bin/java 1065

   update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-9/bin/javac 1065

   update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-9/bin/jar 1065

   update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jdk-9/bin/javaws 1065

   Checking or Setting the System Java Version in Use with

   update-alternatives --config java

   And for the Java Compiler instead:

   sudo update-alternatives --config javac

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

   

6. (Optional) Setting JAVA_HOME User Environment Variable.

   su [myUserName]

   Or simply:

   exit

   And Edit the Bash environment Configuration file

   nano $HOME/.bashrc

   Append:

   export JAVA_HOME=/usr/lib/jvm/jdk-9

   Possibly to Check the JDK 9 exact PATH use in another window:

   ls /usr/lib/jvm/

   Ctr+x to Save & Exit from nano Editor :)
   Next to Load the New Bash Environment:

   bash

7. Finally, Test New Java JDK 9 Installation.

   java -version

How to Install Netbeans 8 IDE for Java 9 on LXLE:
Setup NetBeans Java for Linux.

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

Welcome to Java 9 New Dev Env! ;)