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on't rely on Oracle to install Java properly on your Mac.
Use Homebrew. this will install the latest jdk:
brew cask install java
If you want to manage multiple versions of Java on your Mac, consider using jenv.
UPDATE: Now that Java 8 is no longer the most current version, if you want java 8 install it this way:
brew tap caskroom/versions
brew cask install java8
To get a list of all older versions of java: brew tap caskroom/versions
and then brew cask search java
We use brew cask since we'd otherwise use the Oracle GUI installer that will likely not install Java properly on your Mac. (Use brew cask install APP to install GUI apps; use brew install APP.) Java is not a GUI app; It should not require "cask" but at least Oracle is consistent.