Howto install a new JDK on a Mac

README.md

Howto install a new JDK on a Mac

1. Download JDK: http://jdk.java.net/13/ to ~/Downloads
2. Unpack downloaded .tar.gz bundle
3. Goto base dir cd /Library/Java/JavaVirtualMachines
4. Move unpacked JDK mv ~/Downloads/jdk-13.jdk .
5. Change owner sudo chown -R root jdk-13.jdk/
6. Change group sudo chgrp -R wheel jdk-13.jdk/
7. Remove quarantaine flag sudo xattr -dr com.apple.quarantine jdk-13.jdk
8. Create symlink sudo ln -s jdk-13.jdk/ jdk13

I use the following helper in ~/.bash_profile to switch JDKs:

# -----------------------------------------------------------------------------
#  JDK SWITCHER ...
#  Usage: jdk <version>
# -----------------------------------------------------------------------------

# !! ENSURE NO PATH CHANGES ARE MADE WITHIN THIS SCRIPT BELOW THIS LINE !!
export __BACKUP_PATH=$PATH

function jdk() {
  export JAVA_HOME="/Library/Java/JavaVirtualMachines/jdk$1/Contents/Home"
  export PATH=$JAVA_HOME/bin:$__BACKUP_PATH
}

# set default jdk
jdk 11