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Learnings: Java Development Environment Setup

Tips tricks for managing Java development environments, especially if we're going to be running two Java versions (1.8 + current) for the rest of the '20s

Install / Select which version of Java to run now

SDKMan does a lot, can install Java versions and other JDK based languages. jenv only manages JAVA_HOME - you must install Java versions yourself, then point jenv to those installs.

SDKMan works very hard to figure out what package manager you like best, and use that to install what you asked for. (At least in the past it supported both homebrew and macports...)

MacOS dirty tricks

/usr/libexec/java_home --version gives you (the value for JAVA_HOME).

You could likely replace most of jenv with a simple shell script

export JAVA_HOME=$(/usr/libexec/java_home --version=1.8)