What is the path of JDK on Mac?

Dissecting the JDK ecosystem on macOS

Navigating multiple JDK installations

Multiple balls in the air? You're a developer! Just as we balance numerous software versions, JDKs can multiply in macOS environments. Like a compass, the JAVA_HOME system variable, hence, is central to managing your path through this jungle. Tailor it to the correct JDK version using:

# Jedi Master Yoda says: "Set path, you must!"
export JAVA_HOME=$(/usr/libexec/java_home -v 11)


Dealing with symbolic links

Symbolic links, dubbed symlinks, function as aliases to directories in macOS. The operating system uses these for better navigation, especially to the Java home directory. Grasping that a symlink merely points you elsewhere can aid in successful JDK version management.

JDK paths: A moving target

In rapidly evolving apple landscapes, JDK paths might shift. While /Library/Java/JavaVirtualMachines/ remains the go-to norm, older locations like /System/Library/Java/JavaVirtualMachines/ may still exist on legacy systems.

Busting common pitfalls

Commands like java might not always cooperate. In situations where it points to shifting JDK versions across different Terminal sessions, battle-tested tools such as jEnv can be saviors, condensing margin for error.

Unleashing the JDK:

1. Fire up the "Terminal"
2. Input the glyph: /usr/libexec/java_home
3. Result: Your JDK Path on display

Example:

```bash
# Sherlock Holmes could have used this to find Java!
$ /usr/libexec/java_home
/Library/Java/JavaVirtualMachines/jdk1.8.0_251.jdk/Contents/Home

Unearthing legacy paths

Some JDKs can be found under /System/Library/Frameworks/JavaVM.framework/Home/, a historical path from prior macOS versions. Though rarely needed, such knowledge nuggets can come in handy chasing unusual bugs.

Tracking the java trace

Curious where the java executable lurks? Run this command in your Terminal:

# Marco Polo of Java World
which java


This reveals where your current shell is seeking the java. Demystifying this can lead to less hair-pulling moments!

Extra Tools in Your Kit

Often, developers rely on Homebrew to install and manage their JDKs. If you're one of these crafty folk, brew info java can provide valuable insights into your installed cask.