It is actually a bit of a pain removing Java from OSX but by that I mean it’s only 3 steps instead of 1.
Basically run these commands here:
sudo rm -rf "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin"
sudo rm -rf "/Library/PreferencePanes/JavaControlPanel.prefPane"
sudo rm -rf "~/Library/Application Support/Java"
Reference: http://osxdaily.com/2017/06/16/uninstall-java-mac/