Some utility scripts for the commandline in Linux.

install-jdk.sh

#!/bin/zsh

if [[ -z $1 ]]; then
  echo "Please specify the home path of your jdk!"
  exit
fi

if [[ ! (-d $1) ]]; then
  echo "The directory to the jdk does not exist!"
  exit
fi

HOME_PATH=$1
BIN_PATH=$HOME_PATH/bin

if [[ ! (-d $BIN_PATH) ]]; then
  echo "There is no bin directory in your jdk home!"
  exit
fi

BINARIES=(java javac javaws jar jarsigner javadoc jvisualvm)

echo "Installing Oracle JDK from ${HOME_PATH}"
${BIN_PATH}/java -version

for binary in $BINARIES
do
  if [[ -a $BIN_PATH/$binary ]]; then
    echo "Installing ${binary}..."
    sudo update-alternatives --install "/usr/bin/${binary}" "${binary}" "${BIN_PATH}/${binary}" 1
    sudo update-alternatives --set "${binary}" "${BIN_PATH}/${binary}"
  else
    echo "Can not find ${BIN_PATH}/${binary}!"
  fi
done

echo "That's it!"