Java Installation in Linux | jdk18 Installation in Ubuntu | Java Installation in Ubuntu 20.04 LTS
sudo apt update
sudo apt upgrade
java -version
Download and install jdk18 from oracle.com .deb file
cd Downloads/
sudo dpkg -i jdk-18_linux-x64_bin.deb
ls /usr/lib/jvm
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-18/bin/java 1
java -version
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-18/bin/javac 1
clear
sudo update-alternatives --config java
sudo gedit /etc/environment
source /etc/environment
echo $JAVA_HOME