• https://blog.logrocket.com/run-react-native-apps-android-emulator-macos/
• https://javarepos.com/lib/jenv-jenv-java-general-utility-functions

brew install jenv

Updating Homebrew…
==> Downloading https://ghcr.io/v2/homebrew/portable-ruby/portable-ruby/blobs/sha256:0cb1cc7af109437fe0e020c9f3b7b95c3c709b140bde9f991ad2c1433496dd42
######################################################################### 100.0%
==> Pouring portable-ruby-2.6.8.yosemite.bottle.tar.gz
==> Auto-updated Homebrew!

After the command completes, we must tell our system where to look so it can use jenv, so we need to add it to our path. To do this, we must run the following command in our terminal:

echo ‘export PATH=”$HOME/.jenv/bin:$PATH”‘ >> ~/.zshrc
echo ‘eval “$(jenv init -)”‘ >> ~/.zshrc

We want to install JDK8 because that’s the version that works with our Android SDK Manager. Type the following into the terminal:

brew install adoptopenjdk8

brew install homebrew/cask-versions/adoptopenjdk8

This will install the latest version of Java 8 to a special directory in macOS. Let’s see which directory that is:

ls -1 /Library/Java/JavaVirtualMachines

adoptopenjdk-8.jdk

jenv add /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/

openjdk64-1.8.0.292 added
1.8.0.292 added
1.8 added

jenv versions
system
1.8
1.8.0.292
15
15.0
* 15.0.2 (set by /Users/ricky_tsao/.java-version)
openjdk64-1.8.0.292
openjdk64-15.0.2

jenv info java
Jenv will exec : /Users/ricky_tsao/.jenv/versions/15.0.2/bin/java
Exported variables :
JAVA_HOME=/Users/ricky_tsao/.jenv/versions/15.0.2

java –version
openjdk 15.0.2 2021-01-19
OpenJDK Runtime Environment (build 15.0.2+7-27)
OpenJDK 64-Bit Server VM (build 15.0.2+7-27, mixed mode, sharing)

jenv doctor
[OK] No JAVA_HOME set
[OK] Java binaries in path are jenv shims
[OK] Jenv is correctly loaded