gistfile1.sh

#!/bin/bash

# Oracle hasn't updated the Java 1.7u65 installer to support Yosemite, 
# so here's a way to get it installed. 
# This is actually what I used to get IntelliJ IDEA running, but even
# if you aren't running that IDE, this is a quick script to get Java
# going strong on your fresh install of OS X 10.10


# Install Java 6 for OS X
# ---------------------------------------------
JAVA6_DMG='JavaForOSX2014-001.dmg'
JAVA6_INSTALLER='JavaForOSX.pkg'
JAVA6_VOLUME='/Volumes/Java\ for\ OS\ X\ 2014-001'
wget http://support.apple.com/downloads/DL1572/en_US/JavaForOSX2014-001.dmg -O ~/Downloads/$JAVA6_DMG
hdiutil mount ~/Downloads/$JAVA6_DMG
sudo installer -pkg $JAVA6_VOLUME/$JAVA6_INSTALLER -target /
diskutil unmount $JAVA6_VOLUME

# Install Oracle Java 7u65 SDK
# ---------------------------------------------
CORE_SERVICES='/System/Library/CoreServices'
JDK7_VOLUME='/Volumes/JDK\ 7\ Update\ 65'
JDK7_DMG='jdk-7u65-macosx-x64.dmg'
JDK7_INSTALLER='JDK\ 7\ Update\ 65.pkg'

# create a clone of the SystemVersion plist replacing '10.10' with '10.7.3'
# then back up and replace the SystemVersion plist
sudo cat $CORE_SERVICES/SystemVersion.plist | sed 's/10.10/10.7.3/g' > /tmp/SystemVersion.plist
sudo cp $CORE_SERVICES/SystemVersion.plist $CORE_SERVICES/SystemVersion.plist.bak
sudo mv /tmp/SystemVersion.plist $CORE_SERVICES/SystemVersion.plist

# Install Java
if [ ! -e /opt/homebrew-cask ]; then
  read -p "--> homebrew-cask not found. Please download the Java 7u65 SDK installer to your Downloads folder. Press ENTER once it has finished downloading"
  hdiutil mount ~/Downloads/$JDK7_DMG
  sudo installer -pkg /Volumes/$JDK7_VOLUME/$JDK7_INSTALLER -target /
  diskutil unmount /Volumes/$JDK7_VOLUME
else
  brew tap caskroom/versions
  brew cask install java7
fi

# replace the original plist file
sudo mv $CORE_SERVICES/SystemVersion.plist.bak $CORE_SERVICES/SystemVersion.plist