My Java version is 15.0.1(default), I want to change it to java 8(1.8.0_281).
I downloaded java8, and tried several things but the version doesn't change..
change name of /Library/Java/JavaVirtualMachines/jdk-15.0.1.jdk/Contents/Info.plist to Info.plist.disabled
change version in ~/.bash_profile and run source ~/.bash_profile
write export JAVA_HOME=$(/usr/libexec/java_home -v 1.8) in terminal
I restarted terminal, and run java -version..
but there is still openjdk version "15.0.1"
when I write like this, /usr/libexec/java_home -V there is no 15.0.1.
It return 1.8.0_281 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_281.jdk/Contents/Home
In ~/.zshrc, there is no version infomation. just
export PATH="/usr/local/opt/openjdk/bin:$PATH" export PATH="/usr/local/opt/openjdk/bin:$PATH"
echo $JAVA_HOME show me /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
How to change java version?? help me plz
(macOs is big sur, 11.2)
In mac it's pretty simple you can have two or many java versions and based on your requirement you can change that.
I found a very useful tool called jenv.
If you have already had homebrew (a package installer in mac), you can skip this step.
For installing or updating homebrew
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
Installing JEnv - java version manager a cool tool helps you to switch between multiple java env on your mac
brew install jenv
Adding jEnv to your path depends on the shell you are using ~/.bash_profile or ~/.bashrc , for zsh it's ~/.zshrc. Add these two lines in your bash profile file
export PATH="$HOME/.jenv/bin:$PATH"
eval "$(jenv init -)"
Restart the terminal or use source ~/.zshrc
Check if your JEnv is correctly installed
jenv doctor
you will get the output something like [OK] Jenv is correctly loaded
for installing java 8
brew cask install AdoptOpenJDK/openjdk/adoptopenjdk8
for installing java 11
brew cask install AdoptOpenJDK/openjdk/adoptopenjdk11
for list down all the java on your machine
/usr/libexec/java_home -V
Now add these paths to jENV
Syntax:
jenv add <your_jdk_path>
Example:
jenv add /Library/Java/JavaVirtualMachines/openjdk-14.0.1.jdk/Contents/Home
All done. Check your version
jenv versions
For setting system wide java version
jenv global 14.0
For setting locally to terminal
jenv local 11
if you are using maven or gradle for your project
# ensure that JAVA_HOME is correct
jenv enable-plugin
export# make Maven aware of the Java version in use
(and switch when your project does)
jenv enable-plugin maven
A reference guide
https://www.jenv.be/
Installing java 8 and sbt with brew and/or brew cask is clearly possible,
The problem I am hitting is that brew installs java 13 as sbt dependency,
And I do not know a general way to go back to java 8 as default, since there are so many ways potentially to opt between java version some of which i am aware include PATH, JAVA_HOME, ln -s, java_exec selector.
Another problem potentially is that brew install sbt installs brew install java which is 13,
But java 8 I install it via brew cask.
The TL is saying that Java 13 or 14 might be causing some issues e.g. tests fails, should I push for latest versions of OpenJdk, Scala, SBT, etc?
Indeed, SDK Man is an option.
It actually works with brew also but there need to be just a few manual steps: here they are:
Installing sbt, java8, jenv & configure the shell
We used brew to install sbt (which in its turn installs java 13), and brew cask to install openjdk java 8, like this:
brew install sbt
brew tap AdoptOpenJDK/openjdk
brew cask install adoptjava8
We will use jenv to manage the java versions, with the information from https://github.com/Homebrew/homebrew-core/issues/31390
Basically the next steps are:
brew install jenv
jenv init -
echo 'eval "$(jenv init -)"' >> ~/.bash_profile
echo 'eval "$(jenv init -)"' >> ~/.zprofile
jenv add <path-to-java8-Home-Dir>
Then restart your terminal and you should now be able to run sbt
Where at time of writing <path-to-java8-Home-Dir> is /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
Have a look at a utility like Sdk Man.
It is multi-platform and allows you to set any desired JDK as a default one.
As well as changing it to another provider/version when it will be required.
Installing java8 with Homebrew seems to no longer be working. After running:
brew install caskroom/cask/java8
I get the following error:
Error: Cask 'java8' is unavailable: '/usr/local/Homebrew/Library/Taps/caskroom/homebrew-cask/Casks/java8.rb' does not exist.
Simply doing:
brew cask install java8
Errors out with:
Error: Cask 'java8' is unavailable: No Cask with this name exists.
This seems like a recent development because I remember installing it this way a few months ago. Any suggestions on how to properly install java8 on MacOS nowadays?
New command is now :
brew install --cask homebrew/cask-versions/adoptopenjdk8
This has already been answered as a github issue: https://github.com/Homebrew/homebrew-cask-versions/issues/7253
TLDR: the java8 artefact refers to the Oracle distribution, which has ceased being supported/available. If you really need java 1.8 instead of the latest versions you can take a look at AdoptOpenJDK/homebrew-openjdk.
The command is now brew install homebrew/cask-versions/adoptopenjdk8 --cask
brew install homebrew/cask-versions/adoptopenjdk8 --cask
In the latest changes of homebrew cask will have to be at the last.
AdoptOpenJDK has been deprecated, and transitioned to Eclipse Temurin from Adoptium. See this blog post:
https://blog.adoptopenjdk.net/2021/03/transition-to-eclipse-an-update/
To install Temurin Java 8, aka 1.8, with Homebrew, you can use:
brew tap homebrew/cask-versions
brew install --cask temurin8
If you already had AdoptOpenJDK installed using the commands in the other answers, you should uninstall it first, with:
brew uninstall --cask adoptopenjdk8
You can also download a .pkg for manual installation (the former link at AdoptOpenJDK now leads here):
https://adoptium.net/?variant=openjdk8
For Homebrew 2.7.0. the brew cask commands are disabled
The command is now changed to
brew install --cask adoptopenjdk/openjdk/adoptopenjdk8
for new version use
brew install --cask adoptopenjdk/openjdk/adoptopenjdk8
Although cask remove the support for JAVA8, we can still install JAVA8 using brew.
It requires the manual download of JAVA8.dmg and add the java8.rb which could be used by cask.
Machine: MAC
OS: Mojave (10.14.6)
JAVA version: java 8u231
Step-1
Download dmg file from Oracle Site. You require oracle account to download the same
Step-2
Start the HTTP server from the folder where you downloaded the dmg file. For me it's ~/Downlaods and I use python to start HTTP server:
python -m SimpleHTTPServer 8000
Step-3
Create file java8.rb in /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask/Casks (where java.rb exist) and add the following:
cask 'java8' do
version '8u231,b15:9eef341qase34d44fbaa21'
sha256 'f808d11b34fa9ee7b6326b5b6dd18544496e02c84b839d94e062bd4493df5d45'
url "http://localhost:8000/jdk-#{version.before_comma}-macosx-x64.dmg",
cookies: {
'oraclelicense' => 'accept-securebackup-cookie',
}
name 'Oracle Java 8 Standard Edition Development Kit'
homepage 'https://www.oracle.com/technetwork/java/javase/overview/index.html'
depends_on macos: '>= :yosemite'
pkg 'JDK 8 Update 231.pkg'
uninstall pkgutil: "com.oracle.jdk#{version.before_comma}",
delete: [
'/Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin',
'/Library/PreferencePanes/JavaControlPanel.prefPane',
]
zap trash: [
'~/Library/Application Support/Oracle/Java',
'~/Library/Application Support/com.oracle.java.JavaAppletPlugin.plist',
'~/Library/Application Support/com.oracle.javadeployment.plist',
]
caveats do
license 'https://www.oracle.com/technetwork/java/javase/terms/license/javase-license.html'
end
end
Step-4
Now, install using brew:
brew cask install java8
Note: I got the SHA-256 checksum from the above mentioned java download link. You will have to change the version number, sha256 and
pkg sections to use the specific version you downloaded if it is not 8u231 like mine.
The command is
brew cask install adoptopenjdk8-openj9
Fixed my problem and I can run my project in java8
java -version
openjdk version "1.8.0_222
OpenJDK Runtime Environment (build 1.8.0_222-b10)
Eclipse OpenJ9 VM (build openj9-0.15.1, JRE 1.8.0 Mac OS X amd64-64-Bit Compressed References 20190717_298 (JIT enabled, AOT enabled)
OpenJ9 - 0f66c6431
OMR - ec782f26
JCL - f147086df1 based on jdk8u222-b10)
For some of the newer version of operating system, We can use following command:
brew install --cask homebrew/cask-versions/adoptopenjdk8
I have only managed to uninstall it with homebrew like this:
brew uninstall --ignore-dependencies java
brew install homebrew/cask-versions/adoptopenjdk8 --cask
==> Caveats
Temurin is the official successor to this software:
brew install --cask temurin8
adoptopenjdk8 has been officially discontinued upstream.
It may stop working correctly (or at all) in recent versions of macOS.
Using sdkma, it is little bit easier
Open a new terminal and enter
curl -s “https://get.sdkman.io" | bash
copy & paste the following in the terminal and enter
source "$HOME/.sdkman/bin/sdkman-init.sh"
It will install the SDKMAN in your machine.
Check the version of the SDKMAN
sdk version
See the available Java versions offered by SDKMAN
sdk list java
It will show all the available JDK from different vendors with supported versions.
Install parallel JDKs
install version 15: sdk install java 15.0.0-librca
install version 8: sdk install java 8.0.265-librca
Choose which one you want to use
sdk use java 8.0.265-librca
Ask the user to install Oracle JDK 8 instead of java8
I installed java with homebrew, using the command brew cask install java.
After successfully installing, I typed which java, and the path showed to be /usr/bin/java
When I typed brew cask info java, this showed up:
java: 1.8.0_102-b14 Java Standard Edition Development Kit
/usr/local/Caskroom/java/1.8.0_102-b14 (227.5M)
https://github.com/caskroom/homebrew-cask/blob/master/Casks/java.rb
Contents JDK 8 Update 102.pkg (pkg) Caveats This Cask makes minor
modifications to the JRE to prevent issues with packaged applications,
as discussed here: If your Java application still asks for JRE
installation, you might need to reboot or logout/login.
Installing this Cask means you have AGREED to the Oracle Binary Code
License Agreement for Java SE at
Did I forget to link something?
/usr/bin/java is a symlink.
To see where it points, type ls -la /usr/bin/java
brew cask is installing into /Library/Java/JavaVirtualMachines/jdk1.8.0_something.jdk/Contents/Home
If the previous command ls -la is matching this, you are good.
If not, it means that you previously had another java installation. In this case, you may want to use a tool like jenv to switch between your multiple installs.
To add to #djangofan .. when I did a brew reinstall, I noticed the following message:
==> Pouring openjdk--17.0.1_1.big_sur.bottle.tar.gz
==> Caveats
For the system Java wrappers to find this JDK, symlink it with
sudo ln -sfn /usr/local/opt/openjdk/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk.jdk
openjdk is keg-only, which means it was not symlinked into
/usr/local, because macOS provides similar software and
installing this software in parallel can cause all kinds of
trouble.
If you need to have openjdk first in your PATH, run:
echo 'export PATH="/usr/local/opt/openjdk/bin:$PATH"' >> /Users/johndoe/.bash_profile
For compilers to find openjdk you may need to set:
export CPPFLAGS="-I/usr/local/opt/openjdk/include"
To his point, I did not install via cask. I assume that when you did the install you got a similar message that you simply did not notice.
How can I install an additional java on MacOS? I installed jdk8 and that works fine. But now I need a jdk7 installation for development purposes. When trying to install the old version via DMG file, i get a warning, that there is already a newer version of java installed and the installer quits.
/usr/libexec/java_home -verbose
Matching Java Virtual Machines (1):
1.8.0_20, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home
How to install jdk7 in addition to this one?
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
As seen on http://hanxue-it.blogspot.ch/2014/05/installing-java-8-managing-multiple.html , these are the steps to follow.
install homebrew
install homebrew jenv
install homebrew-cask
install a specific java version using cask (see "homebrew-cask versions" paragraph below)
add this version for jenv to manage it
check the version is correctly managed by jenv
repeat steps 4 to 6 for each version of java you need
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 install --cask java7
brew install --cask 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.
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:
Built-in JRE default: /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
JDKs downloaded from Apple: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/
JDKs downloaded from Oracle: /Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk/Contents/Home
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
Uninstall jdk8, install jdk7, then reinstall jdk8.
My approach to switching between them (in .profile) :
export JAVA_7_HOME=$(/usr/libexec/java_home -v1.7)
export JAVA_8_HOME=$(/usr/libexec/java_home -v1.8)
export JAVA_9_HOME=$(/usr/libexec/java_home -v9)
alias java7='export JAVA_HOME=$JAVA_7_HOME'
alias java8='export JAVA_HOME=$JAVA_8_HOME'
alias java9='export JAVA_HOME=$JAVA_9_HOME'
#default java8
export JAVA_HOME=$JAVA_8_HOME
Then you can simply type java7 or java8 in a terminal to switch versions.
(edit: updated to add Dylans improvement for Java 9)
For macOS Sierra 420
This guide was cobbled together from various sources (replies above as well as other posts), and works perfect.
0. If you haven't already, install homebrew.
See https://brew.sh/
1. Install jenv
brew install jenv
2. Add jenv to the bash profile
if which jenv > /dev/null; then eval "$(jenv init -)"; fi
3. Add jenv to your path
export PATH="$HOME/.jenv/shims:$PATH"
4. Tap "homebrew/cask-versions"
FYI: "Tap" extends brew's list of available repos it can install, above and beyond brew's default list of available repos.
brew tap homebrew/cask-versions
5. Install the latest version of java
brew install java --cask
6. Install java 6 (or 7 or 8 whatever you need)
brew install java6 --cask
#brew install java7 --cask
#brew install java8 --cask
? Maybe close and restart Terminal so it sees any new ENV vars that got setup.
7. Review Installations
All Java version get installed here: /Library/Java/JavaVirtualMachines lets take a look.
ls -la /Library/Java/JavaVirtualMachines
8. Add each path to jenv one-at-a-time.
We need to add "/Contents/Home" to the version folder.
WARNING: Use the actual paths on your machine... these are just EXAMPLE's
jenv add /Library/Java/JavaVirtualMachines/1.6.0___EXAMPLE___/Contents/Home
jenv add /Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk___EXAMPLE___/Contents/Home
9. Check if jenv registered OK
jenv versions
10. Set java version to use (globably)
Where XX matches one of the items in the versions list above.
jenv global XX
Check java version
java -version
Check jenv versions
Should also indicate the current version being used with an asterisk.
jenv versions
DONE
Quick future reference
To change java versions
... See the list of available java versions
jenv versions
... then, where XX matches an item in the list above
jenv global XX
SDKMAN! is a great tool for using multiple versions of Java, Gradle, Groovy, Kotlin, and other JVM tools on Mac OS. Installation and usage doc are easily found on the main site.
(I have no affiliation, just a happy user).
As an example usage, if I type the following in a Terminal window, there is a list of available Java SDK versions (edited for brevity):
$ sdk list java
Available Java Versions
+ 9ea170
> + 8u131
7u141-zulu
Here + denotes that the version is installed. > denotes which version is currently in use. To install a version:
$ sdk install java 7u141-zulu
To use a version in this Terminal window:
$ sdk use java 9ea170
First, you need to make certain you have multiple JAVA versions installed.
Open a new Terminal window and input:
/usr/libexec/java_home -V
Your output should look like:
Matching Java Virtual Machines (2):
11.0.1, x86_64: "Java SE 11.0.1" /Library/Java/JavaVirtualMachines/jdk-11.0.1.jdk/Contents/Home
1.8.0_201, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home
Note that there are two JDKs available. If you don’t notice the Java version you need to switch to, download and install the appropriate one from here https://www.oracle.com/java/technologies/downloads/
(JDK 8 is represented as 1.8) .
Once you have installed the appropriate JDK, repeat this step.
Take note of the JDK version you want to switch to. For example, “11.0” and “1.8” are the JDK versions available in the example above.
Switch to the desired version. For example, if you wish to switch to JDK 8, input the following line:
export JAVA_HOME=/usr/libexec/java_home -v 1.8
For 11.0, switch “1.8” with “11.0”
4. Check your JDK version by inputting into Terminal:
java -version
If you have followed all the steps correctly, the JDK version should correlate with the one you specified in the last step.
5. (Optional) To make this the default JDK version, input the following in Terminal:
open ~/.bash_profile
Then, add your Terminal input from step 3 to this file:
SWITCH TO JAVA VERSION 8
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
Save and close the file.
As found on this website
So Let’s begin by installing jEnv
Run this in the terminal
brew install https://raw.github.com/gcuisinier/jenv/homebrew/jenv.rb
Add jEnv to the bash profile
if which jenv > /dev/null; then eval "$(jenv init -)"; fi
When you first install jEnv will not have any JDK associated with it.
For example, I just installed JDK 8 but jEnv does not know about it. To check Java versions on jEnv
At the moment it only found Java version(jre) on the system. The * shows the version currently selected. Unlike rvm and rbenv, jEnv cannot install JDK for you. You need to install JDK manually from Oracle website.
Install JDK 6 from Apple website. This will install Java in /System/Library/Java/JavaVirtualMachines/. The reason we are installing Java 6 from Apple website is that SUN did not come up with JDK 6 for MAC, so Apple created/modified its own deployment version.
Similarly install JDK7 and JDK8.
Add JDKs to jEnv.
JDK 6:
JDK 7:
JDK 8:
Check the java versions installed using jenv
So now we have 3 versions of Java on our system. To set a default version use the command
jenv local <jenv version>
Ex – I wanted Jdk 1.6 to start IntelliJ
jenv local oracle64-1.6.0.65
check the java version
java -version
That’s it. We now have multiple versions of java and we can switch between them easily. jEnv also has some other features, such as wrappers for Gradle, Ant, Maven, etc, and the ability to set JVM options globally or locally. Check out the documentation for more information.
In the same spirit than #Vegard (lightweight):
Install the wanted JDKs with Homebrew
Put this jdk bash function and a default in your .profile
jdk() {
version=$1
export JAVA_HOME=$(/usr/libexec/java_home -v"$version");
java -version
}
export JAVA_HOME=$(/usr/libexec/java_home -v11); # Your default version
and then, to switch your jdk, you can do
jdk 9
jdk 11
jdk 13
Based on https://github.com/AdoptOpenJDK/homebrew-openjdk.
Manage multiple java version in MAC using jenv
Install homebrew using following command
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
install jenv and activate jenv
brew install jenv
echo 'eval "$(jenv init -)"' >> ~/.bash_profile
tap cask-versions
brew tap homebrew/cask-versions
search available java version that can be installed
brew search java
E.g. to install java6 use following command
brew install cask java6
Add multiple versions of java in jenv
jenv add /Library/Java/JavaVirtualMachines/jdk1.8.0_231.jdk/Contents/Home
jenv add /Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
Note:- if you get error like ln: /Users/<username>/.jenv/versions/oracle64-1.8.0.231: No such file or directory, then run following:-
mkdir -p /Users/<username>/.jenv/versions/oracle64-1.8.0.231
Rehash jenv after adding jdk’s
jenv rehash
List known versions of java to jenv
jenv versions
Set default version
jenv global oracle64-1.8.0.231
Change java version for a project
jenv local oracle64-1.6.0.65
set JAVA_HOME with the same version as jenv
jenv exec bash
echo $JAVA_HOME
I find this Java version manager called Jabba recently and the usage is very similar to version managers of other languages like rvm(ruby), nvm(node), pyenv(python), etc. Also it's cross platform so definitely it can be used on Mac.
After installation, it will create a dir in ~/.jabba to put all the Java versions you install. It "Supports installation of Oracle JDK (default) / Server JRE, Zulu OpenJDK (since 0.3.0), IBM SDK, Java Technology Edition (since 0.6.0) and from custom URLs.".
Basic usage is listed on their Github. A quick summary to start:
curl -sL https://github.com/shyiko/jabba/raw/master/install.sh | bash && . ~/.jabba/jabba.sh
# install Oracle JDK
jabba install 1.8 # "jabba use 1.8" will be called automatically
jabba install 1.7 # "jabba use 1.7" will be called automatically
# list all installed JDK's
jabba ls
# switch to a different version of JDK
jabba use 1.8
I am using Mac OS X 10.9.5. This is how I manage multiple JDK/JRE on my machine when I need one version to run application A and use another version for application B.
I created the following script after getting some help online.
#!bin/sh
function setjdk() {
if [ $# -ne 0 ]; then
removeFromPath '/Library/Java/JavaVirtualMachines/'
if [ -n "${JAVA_HOME+x}" ]; then
removeFromPath $JAVA_HOME
fi
export JAVA_HOME=/Library/Java/JavaVirtualMachines/$1/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH
fi
}
function removeFromPath() {
export PATH=$(echo $PATH | sed -E -e "s;:$1;;" -e "s;$1:?;;")
}
#setjdk jdk1.8.0_60.jdk
setjdk jdk1.7.0_15.jdk
I put the above script in .profile file. Just open terminal, type vi .profile, append the script with the above snippet and save it. Once your out type source .profile, this will run your profile script without you having to restart the terminal. Now type java -version it should show 1.7 as your current version. If you intend to change it to 1.8 then comment the line setjdk jdk1.7.0_15.jdk and uncomment the line setjdk jdk1.8.0_60.jdk. Save the script and run it again with source command. I use this mechanism to manage multiple versions of JDK/JRE when I have to compile 2 different Maven projects which need different java versions.
Jenv on Mac Sierra:
if not working after install, do this bug fix to add java executable to path
export PATH="$HOME/.jenv/shims:$PATH"
even though eval "$(jenv init -)" could do this job. The reason is /bin folder is not there anymore as describe in it's homepage, but shim folder is used as /bin instead.
Make sure ~/.jenv is there
which java may print /Library/...
jenv global 1.8
jenv shell 1.8
Eventually, which java gives you:
/Users/xxxx/.jenv/shims/java
I answer lately and I really recommand you to use SDKMAN instead of Homebrew.
With SDKMAN you can install easily different version of JAVA in your mac and switch from on version to another.
You can also use SDKMAN for ANT, GRADLE, KOTLIN, MAVEN, SCALA, etc...
To install a version in your mac you can run the command sdk install java 15.0.0.j9-adpt
I know that this question already have a lot of answers, but I want to share my solution only using Temurin and bash.
AdoptOpenJdk is deprecated and that is why I'm using Temurin.
1. Download Temurin using the mirrors or a package manager
$ brew install --cask temurin
And for other versions (like Java 8):
$ brew tap homebrew/cask-versions
$ brew install --cask temurin8
2. Add a bash script into your bash profile
Open your ~/.zshrc or ~/.bash_profile (depending on what you're using it)
And add this code:
set-jdk() {
jdkversion=$1
export JAVA_HOME=/Library/Java/JavaVirtualMachines/temurin-"$jdkversion".jdk/Contents/Home;
export PATH=$PATH:$JAVA_HOME/bin;
java -version
}
3. Restart your terminal and change your Java version
$ set-jdk N N being the Java version that you want and it's already installed
e.g.
$ set-jdk 8 To change to Java 8 / 1.8
Few considerations:
It will only keep the Java version on the terminal session that you used the set-jdk command
It won't set the Java version as global
When you want to add the JAVA_HOME into another script/application, you can set /Library/Java/JavaVirtualMachines/temurin-<version>.jdk/Contents/Home (change the for the desired Java version. Like this JD-GUI example)
Enjoy
As of 2023, brew install --cask zulu8 didn't work for me on Apple chip. brew install openjdk#8 also didn't not. The only one solution worked for me was brew install --cask adoptopenjdk8 and then of course vim ~/.zshrc and inside:
export JAVAC_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/
export JAVA_11_HOME=$(/usr/libexec/java_home -v11)
export JAVA_8_HOME=$(/usr/libexec/java_home -v1.8)
alias javac8='export JAVA_HOME=$JAVAC_HOME'
alias java11='export JAVA_HOME=$JAVA_11_HOME'
alias java8='export JAVA_HOME=$JAVA_8_HOME'
switch from terminal using javac8 to a freshly installed (different) version. Note: you can have different Java versions than me, so it's just an example.
Edit: for some reason it takes some time once it's activate. It seems to me a restart of a laptop is needed.
Here's a more DRY version for bash (Based on Vegard's answer)
Replace 1.7 and 1.8 with whatever versions you are interested with
and you'll get an alias called 'javaX'; where 'X' is the java version (7 / 8 in the snippet below) that will allow you to easily switch versions
for version in 1.7 1.8; do
v="${version: -1}"
h=JAVA_"$v"_HOME
export "$h"=$(/usr/libexec/java_home -v $version)
alias "java$v"="export JAVA_HOME=\$$h"
done
To install more recent versions of OpenJDK, I use this. Example for OpenJDK 14:
brew info adoptopenjdk
brew tap adoptopenjdk/openjdk
brew cask install adoptopenjdk14
See https://github.com/AdoptOpenJDK/homebrew-openjdk for current info.
I followed steps in below link - https://medium.com/#euedofia/fix-default-java-version-on-maven-on-mac-os-x-156cf5930078 and it worked for me.
cd /usr/local/Cellar/maven/3.5.4/bin/
nano mvn
--Update JAVA_HOME -> "${JAVA_HOME:-$(/usr/libexec/java_home)}"
mvn -version
New commands for installing Java via Homebrew:
brew cask install adoptopenjdk/openjdk/adoptopenjdk8
brew cask install adoptopenjdk/openjdk/adoptopenjdk11
See the homebrew-openjdk repo for the latest commands.
Installing Java
You can install Java via Homebrew, Jabba, SDKMAN or manually. See this answer for details on all the commands.
Switching Java versions*
You can switch Java versions with jenv Jabba, SDKMAN or manually. See details on all the switching commands here.
Best solutions
Jabba is designed to work on multiple platforms, so it's a good option if you want a solution that'll also work on Windows
Using Homebrew to download Java versions and jenv to switch versions provides a nice workflow. jenv makes it easy to work with Java versions stored in any directory on your machine, so it's a good alternative if you're interested in storing Java in non-default directories.
Using SDKMAN to download Javas and switch versions is another great alternative
Manually switching should be avoided because it's an unnecessary headache.
Function to manually switch Java versions
Here's the Bash / ZSH function for manually switching Java versions (by OpenJDK):
jdk() {
version=$1
export JAVA_HOME=$(/usr/libexec/java_home -v"$version");
java -version
}
There are great tools for switching Java versions, so I highly recommend against doing it manually.
Here is a great tutorial
https://medium.com/#chamikakasun/how-to-manage-multiple-java-version-in-macos-e5421345f6d0
by using jEnv installed by brew
or you can check out homebrew-openjdk
https://github.com/AdoptOpenJDK/homebrew-openjdk managing version using brew Tap
To find the available Java versions:
brew search java
To install the latest stable version (19 as of today):
brew info java
brew install java
For the system Java wrappers (eg: IDEs) to find the latest JDK, symlink it with:
sudo ln -sfn /opt/homebrew/opt/openjdk/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk.jdk
To install a specific version (11):
brew install java11
For the system, Java wrappers to find JDK 11:
sudo ln -sfn /opt/homebrew/opt/openjdk#11/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-11.jdk
You can have one of the OpenJDK versions in your PATH. Add one of the following lines to your ~/.bash_profile
export PATH="/opt/homebrew/opt/openjdk/bin:$PATH
export PATH="/opt/homebrew/opt/openjdk#11/bin:$PATH
Then,
source ~/.bash_profile
I solved this error on my mac m1 air just by adding the path of new jdk version in ~/.zshrc file.
I have multiple jdks in my /Library/Java/JavaVirtualMachines path. So I can choose any version I wish to set as my default java path.