Preliminary CLI installation of JDK on Mac

install_jdk_mac.sh

#!/bin/bash

#Tweak this if need be for you system!
TARGET_VOLUME="/Volumes/Macintosh HD"

DMG_NAME="jdk-8u101-macosx-x64.dmg"
MOUNT_VOLUME="/Volumes/JDK 8 Update 101"
SHA_256="680de8ddead3867fc34e7ff380f437c7ddb8dc75eb606186a3e8ae7e3b8c7fbc"

echo "Getting the DMG..."
curl -L "http://download.oracle.com/otn-pub/java/jdk/8u101-b13/${DMG_NAME}" --cookie oraclelicense=accept-securebackup-cookie > "$DMG_NAME"

checksum=$(shasum -a 256 "$DMG_NAME" | awk '{print $1}')
if [[ $SHA_256 != $checksum ]]; then
  echo "SHA-256 does not match!"
  echo "Expected: $SHA_256"
  echo "Actual  : $checksum"
  exit 1
else
  echo "$SHA_256 SHA-256 checksum matches..."
fi

echo "Attaching to the DMG..."
disks=$(hdiutil attach -noverify -nomount "$DMG_NAME")
disk=$(echo "$disks" | awk '{print $1;}' | head -n 1)

echo "Mounting $disk to /Volumes..."
diskutil mountDisk "$disk"

echo "We will be needing sudo powers for installing PKG..."
sudo -E installer -package "${MOUNT_VOLUME}/JDK 8 Update 101.pkg" -target "${TARGET_VOLUME}"

echo "Copying JDK Home to SDKMAN! tmp folder..."
cp -rf /Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home ~/.sdkman/tmp/java-1.8.0u101

echo "Preparing the SDK zip..."
cd ~/.sdkman/tmp  && zip -qr java-1.8.0u101.zip java-1.8.0u101

echo "Moving SDK zip to archives folder..."
mv ~/.sdkman/tmp/java-1.8.0u101.zip ~/.sdkman/archives

echo "Moving SDK folder to candidates..."
mkdir -p ~/.sdkman/candidates/java/1.8.0u101
mv ~/.sdkman/tmp/java-1.8.0u101/* ~/.sdkman/candidates/java/1.8.0u101
rmdir ~/.sdkman/tmp/java-1.8.0u101

echo "Unmounting volume..."
hdiutil unmount "$MOUNT_VOLUME"

To see if it works:

$ export JAVA_HOME="$HOME/.sdkman/candidates/java/1.8.0u101"
$ export PATH="$JAVA_HOME/bin:$PATH"