I downloaded Java 8 from oracle.com, and I installed it. Nothing unusual. But when I type java I get: No Java runtime present, requesting install. And if I go to settings the java icon is there!
I recommend using
jenv and Homebrew together to manage Java installations and environments, especially as you're working from the command line.
brew install jenv
Then install the java version you want, Java 8 is annoying bc it's not in Homebrew itself anymore, but this works
brew cask install adoptopenjdk/openjdk/adoptopenjdk8
Then add it to
jenv add /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
Then set it as the global
jenv global 1.8
java -version is
openjdk version "1.8.0_242" OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_242-b08) OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.242-b08, mixed mode)
jenv has been very useful to me as a Java developer for managing and switching between all my different Java versions. It also conveniently lets you set versions specific to projects/directories with