#!/bin/bash

versions=(8 11)

if [ $# -eq 0 ]
  then
    echo "No arguments supplied. exiting"
    exit 1
fi

if [[ " "${versions[@]}" " == *" "$1" "* ]] ;then
  echo "changing to Jdk ${1}"

  sudo rm /opt/jdks/java_home
  sudo ln -s /opt/jdks/$1 /opt/jdks/java_home

  java -version
else
  echo "$1 not recognized. valid values are 8 and 11"
  exit 2
fi