- #Switch jdk on mac but how to
- #Switch jdk on mac but mac os x
- #Switch jdk on mac but update
- #Switch jdk on mac but free
You can then set the active version by entering the version as the first command-line argument. Run it without arguments to see what versions of Java are installed.
#Switch jdk on mac but mac os x
Simply copy the code below into a text editor like TextEdit, and make sure to save as plain text: #!/bin/shcd /System/Library/Frameworks/amework/VersionsCURJDK="`readlink CurrentJDK`"echo Current JDK version: $CURJDKif thenecho Installed versions:lsexitfiVERFOUND=`ls | grep $1 | head -n 1`if thenBASE="`basename $0`"echo Error: Could not change JDK- version $1 not installed!echo Run $BASE without arguments to see a list of installed versions.exit 127fiecho You must now enter your Mac OS X password to change the JDK.sudo ln -fhsv $1 CurrentJDKSave this as setJDK (or anything else that tickles your fancy) then go into the terminal and type chmod +x setJDK in the directory where you saved the file (ideally somewhere on your path). So I wrote the following simple UNIX shell script to allow me to easily switch between the different Java versions I have installed. Since I develop and test Java apps on different JDK versions, this was a necessity for me. Unfortunately, even using the bundled Java Preferences app, I could find no easy way to change the version of Java used by the java and javac commands in Terminal.
#Switch jdk on mac but update
Download a copy by clicking the button below.I recently downloaded and installed Apple's Java 1.5.0 update for Tiger. 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
![switch jdk on mac but switch jdk on mac but](https://i.imgur.com/f3k144X.png)
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)
![switch jdk on mac but switch jdk on mac but](https://i.stack.imgur.com/z9G8a.png)
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. 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. 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.
#Switch jdk on mac but free
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#Switch jdk on mac but how to
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.