How to install Oracle Java and JDK on Ubuntu 20.10

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 How to install Oracle Java and JDK on Ubuntu 20.10:- 


1. sudo apt-get update

2. sudo mkdir /usr/lib/jvm

3. cd /usr/lib/jvm

4. sudo tar -xvzf /mnt/jdk-8u221-linux-x64.tar.gz

5. sudo gedit /etc/environment

6. PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/jvm/jdk1.8.0_221/bin:/usr/lib/jvm/jdk1.8.0_221/db/bin:/usr/lib/jvm/jdk1.8.0_221/jre/bin"

J2SDKDIR="/usr/lib/jvm/jdk1.8.0_221"

J2REDIR="/usr/lib/jvm/jdk1.8.0_221/jre"

JAVA_HOME="/usr/lib/jvm/jdk1.8.0_221"

DERBY_HOME="/usr/lib/jvm/jdk1.8.0_221/db"


7.sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.8.0_221/bin/java" 0

  sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.8.0_221/bin/javac" 0

  sudo update-alternatives --set java /usr/lib/jvm/jdk1.8.0_221/bin/java

  sudo update-alternatives --set javac /usr/lib/jvm/jdk1.8.0_221/bin/javac


8. update-alternatives --list java

   update-alternatives --list javac


9. java -version

Location: Jaipur, Rajasthan, India

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