Configure a new installed JDK on Ubuntu Linux

install-java.sh

#!/bin/bash
if [ -z $1 ]
then
	echo "Most provide a JDK name from /usr/lib/jvm. For instance: jdk-11"
	exit 1
fi

jdk=$1
priority=2000
jdkpath="/usr/lib/jvm/${jdk}"

if [ ! -d $jdkpath ]
then
	echo "Does not exist a JDK at $jdkpath"
	exit 1
fi

echo "Installing JDK at ${jdk}"
CMD="java javac jar jshell"
for cmd in $CMD
do
	file="${jdkpath}/bin/${cmd}"
	echo "Installing command ${file}"
	if [ -x ${file} ]
	then
		echo "Command ${file} found"
		sudo update-alternatives --install /usr/bin/${cmd} $cmd $file $priority
		sudo update-alternatives --set $cmd $file
		echo "Command ${file} installed."
	fi
done