Step-by-step – Oracle JDK 8 Ubuntu 20.04 Installation Guide

April 28, 2020 | By the+gnu+linux+evangelist | Filed in: Tutorial.

Installing

  • 4. Setting Up Oracle JDK

    Then to Setup Oracle JDK 8.

    First, make a jvm Directory if Not already there with:

    sudo su -c 'if [ ! -d "/usr/lib/jvm" ]; then mkdir /usr/lib/jvm; fi'

    Set the root superUser as owner:

    sudo chown -R root:root /tmp/jdk1.8*

    Reiterate the Execution Permission over the Java binaries:

    sud chmod -R +x /tmp/jdk1.8*/bin

    Finally, Shift the Java contents with:

    sudo mv /tmp/jdk1.8* /usr/lib/jvm/

    If Got “User is Not in Sudoers file” then see: How to Enable sudo

  • 5. Installing Oracle JDK

    Then to Install Oracle Java JDK 8
    You can directly Copy & Paste the Commands into Terminal…
    Execute this Sequence of Commands:

    update-alternatives --install 
    /usr/bin/java java /usr/lib/jvm/jdk1.8*/bin/java 1065
    
    update-alternatives --install 
    /usr/bin/javac javac /usr/lib/jvm/jdk1.8*/bin/javac 1065
    
    update-alternatives --install 
    /usr/bin/jar jar /usr/lib/jvm/jdk1.8*/bin/jar 1065
    
    update-alternatives --install 
    /usr/bin/javaws javaws /usr/lib/jvm/jdk1.8*/bin/javaws 1065
    

    Checking or Setting the System Java Version in Use with

    update-alternatives --config java
    

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

  • 6. Setting Up Environment

    (Optional) Setting JAVA_HOME User Environment Variable
    Edit the Bash environment Configuration file:

    nano $HOME/.bashrc

    And Append:

    export JAVA_HOME=/usr/lib/jvm/jdk1.8[uX]

    Replace the [uX] Looking for the Installed Java 8 Version with:

    ls /usr/lib/jvm/

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

    bash
  • 7. Testing Oracle JDK

    Finally, Test Java JDK 8 Installation
    By:

    java -version
  • Java 8 IDEs Installation on Ubuntu

    How to Install Eclipse for Java 8 Development on Ubuntu: Installing Eclipse IDE for Java 8 on Ubuntu.

    How to Install Netbeans 8 IDE for Java on Ubuntu: Installing NetBeans IDE for Java Development on Ubuntu.

    How to Install IntelliJ IDEA 2020 for Java Dev on Ubuntu: Installing IntelliJ IDEA for Java on Ubuntu.

    Now Thanks to Oracle-Sun Corporation You are Able to Successfully Start Up with Java 8 Development.

    Welcome to Java 8 Challenge! ;)

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