How to Set or Change the Default Java (Jdk) Version on Macos

change java version in macOS BigSur

Please use below command :-

export JAVA_HOME=`/usr/libexec/java_home -v 1.8.0_261`

switch java version on mac OS

Assuming you have jdk1.8.0.172 installed, one option is:

export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home

Add/Make New JDK the default JDK on Mac OS

there are a few questions on stackoverflow like this.

In general to set java 1.8 as the shell enviroment try this:

export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

How to set or change the default Java (JDK) version on macOS?

set mac jdk version to 1.8

set mac jdk version to 1.8

To set Java to 1.8 for your shell environment, put this in your ~/.bash_profile:

export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

Mac OS X and multiple Java versions

The cleanest way to manage multiple java versions on Mac is to use Homebrew.

And within Homebrew, use:

• homebrew-cask to install the versions of java
• jenv to manage the installed versions of java

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As seen on http://hanxue-it.blogspot.ch/2014/05/installing-java-8-managing-multiple.html , these are the steps to follow.

1. install homebrew
2. install homebrew jenv
3. install homebrew-cask
4. install a specific java version using cask (see "homebrew-cask versions" paragraph below)
5. add this version for jenv to manage it
6. check the version is correctly managed by jenv
7. repeat steps 4 to 6 for each version of java you need

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homebrew-cask versions

Add the homebrew/cask-versions tap to homebrew using:

brew tap homebrew/cask-versions

Then you can look at all the versions available:

brew search java

Then you can install the version(s) you like:

brew cask install java7
brew cask install java6

And add them to be managed by jenv as usual.

jenv add <javaVersionPathHere>

I think this is the cleanest & simplest way to go about it.

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Another important thing to note, as mentioned in Mac OS X 10.6.7 Java Path Current JDK confusing :

For different types of JDKs or installations, you will have different
paths

You can check the paths of the versions installed using /usr/libexec/java_home -V, see How do I check if the Java JDK is installed on Mac?

On Mac OS X Mavericks, I found as following:

1) Built-in JRE default: /Library/Internet\
Plug-Ins/JavaAppletPlugin.plugin/Contents/Home

2) JDKs downloaded from Apple: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/

3) JDKs downloaded from Oracle: /Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk/Contents/Home

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Resources

• Removing Java 8 JDK from Mac
• http://hanxue-it.blogspot.ch/2014/05/installing-java-8-managing-multiple.html
• http://sourabhbajaj.com/mac-setup/index.html
• http://brew.sh
• https://github.com/Homebrew/homebrew/tree/master/share/doc/homebrew#readme
• http://sourabhbajaj.com/mac-setup/Homebrew/README.html
• "brew tap” explained https://github.com/Homebrew/homebrew/blob/master/share/doc/homebrew/brew-tap.md
• “brew versions” explained Homebrew install specific version of formula? and also https://github.com/Homebrew/homebrew-versions
• https://github.com/caskroom/homebrew-cask
• “cask versions”, similar to “brew versions”, see https://github.com/caskroom/homebrew-versions and also https://github.com/caskroom/homebrew-cask/issues/9447
• http://www.jenv.be
• https://github.com/gcuisinier/jenv

Changing MacOS java version, Eclipse OpenJ9

There is a very easy way of managing JDK installations almost automatically using something like SDKMAN. I suggest you have a look at this, as it would greatly simplify the process of managing whatever is that you need to manage. Note that the solution work for both MacOS and Linux.

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