#Managing multiple java versions on mac how to
#Managing multiple java versions on mac code
#Managing multiple java versions on mac free
#Managing multiple java versions on mac mac

I had openjdk installed in my conda base env (it was required by another program installed with conda) and I could not get this solution to work until I uninstalled openjdk from my active conda env or switched to an env without openjdk installed. Quick warning: This does NOT seem to work if you have Java installed in some way through conda. Most other guides I tried to follow are written for outdated brew functionality.

#Managing multiple java versions on mac how to

Download a copy by clicking the button below.Thank you for this recent tutorial on how to manage Java versions with Homebrew. Looking for additional Java resources? We cover all ends of the Java earth in our blog.Īlso, our Java 8 cheat sheet puts all the basic stuff on a single page for easy reference. If you want to check your Java version from the command line, use the command Oh, also, it might be a good idea to add the setjdk 1.8 line to the ~/.bashrc, so all your sessions start with a predetermined JDK version. If it doesn't, debugging this small shell script is quite straightforward (hint: most probably it's a typo, check yourself), so we'll omit the debugging guide from this post for brevity. Java HotSpot(TM) 64-Bit Server VM (build 9-ea+174, mixed mode) Java(TM) SE Runtime Environment (build 9-ea+174) Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode) Java(TM) SE Runtime Environment (build 1.8.0_91-b14)

Try now setting your default Java to one of the different Java versions you currently have installed. If you're doing it in a terminal session, reload it with the source ~/.bashrc. Now with these functions in place you can set the desired versions of Java as active. Essentially, it removes whatever you pass it from the $PATH. It uses sed to replace the argument value with an empty string. What it does is pretty self-explanatory, albeit quite cryptic. Oh, and don't forget to add it to the ~/.bashrc too.Įxport PATH=$(echo $PATH | sed -E -e 's :$1 ' -e 's $1:? ') Here's what the removeFromPath function looks like.

#Managing multiple java versions on mac code

Since you'd like to switch the versions back and forth, we also include the code to clean up the $PATH, to remove the current version of the $JAVA_HOME/bin from it. Then it exports the $JAVA_HOME and the correct $PATH values. This script finds the correct $JAVA_HOME location by using the /usr/libexec/java_home utility passing the argument string as a parameter. RemoveFromPath '/System/Library/Frameworks/amework/Home/bin'Įxport JAVA_HOME=`/usr/libexec/java_home -v PATH=$JAVA_HOME/bin:$PATH The first function, which we'll use later to set the JDK versions is setjdk. So open it in your favorite editor, something line atom ~/.bashrc would do. We'll utilize the ~/.bashrc file to declare the functions we'll use later. Here's how I do it, and if I'm not mistaken I took this approach from Neeme. To run Java command line utilities successfully, including the java command, you need two things: When you download a new JDK release it comes as an installer, so you double click it, click the 'Next' button necessary amount of times, and it puts the files somewhere on the filesystem. If you have a good recipe on how you switch Java versions on the command line on Windows, please share with the community in the comments.

#Managing multiple java versions on mac mac

Note, I'm using a Mac, and the scripts in this post will work on a Mac and, perhaps, on some Linux machines. In this post, I want to share my setup to switch the active JDK version on the command line.

#Managing multiple java versions on mac free

Start Free Switching Java Versions Via the Command Line Try JRebel free for 10 days to see how it supports your JDK.

In this article, we look at how to switch Java versions via the command line. With Java releases coming out every 6 months, many developers want to try out the new features included in each release. However, you probably won't migrate all your projects to a new version yet and will want to maintain several versions of the JDK on your machine, switching Java versions when needed.