Step-by-step – Oracle JDK 7 Ubuntu 21.04 Installation

March 21, 2021 | By the+gnu+linux+evangelist.

Installing

  1. 2. Downloading Oracle JDK 7

    Download Oracle Java SE 7 JDK for Linux.

    Oracle JDK i586/x8664 tar.gz

    If you are using Firefox then on Prompt Choose “Open with Archive Manager”:

    Firefox Prompt

    Or After try to Select the Package by the Downloads Button on Top Panel:

    Downloaded Packages

    Instead, on Google-Chrome simply try to Choose the Package on the Bottom Panel:

    Chrome Bottom Panel Downloads

    How to Install Chrome Browser on Linux

  2. 3. Extracting Oracle JDK 7

    Then Extract JDK 7 into /tmp
    Possibly Double-Click/Right-Click to Open with Archive Manager.
    Or from Shell:

    tar xvzf ~/Downloads/jdk-7*.tar.gz -C /tmp/

    Install Oracle JDK 7 on Ubuntu 21.04 Hirsute - Extraction Path

  3. 4. Setting Up Oracle JDK 7

    Next Relocate Oracle JDK 7 Contents
    Login as the SuperUser:

    sudo su

    Authenticate with the User Admin Pass.
    If Got “User is Not in Sudoers file” then see: How to Enable sudo
    To Make a jvm Directory Only if Not already there
    (You can directly copy & paste the commands into the terminal)

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

    Set the root superUser as owner

    sudo chown -R root:root /tmp/jdk1.7*

    Then to shift the Oracle JDK 7 contents

    mv /tmp/jdk1.7* /usr/lib/jvm/
    
  4. 5. Installing Oracle JDK 7

    Next to Install Oracle Java JDK 7.

    update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7*/bin/java 1065
    
    update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7*/bin/javac 1065
    
    update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.7*/bin/jar 1065
    
    update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.7*/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. :)
    Last Achieve the SuperUser session:

    exit

Contents


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