Need help installing OpenJDK 11 on MacOS? Click here to learn how in this simple, easy-to-follow tutorial with sample code!
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Join For FreeAfter installing Java for macOS 2012-006, can I continue to use Apple's Java 6 alongside the macOS JDK for Java 12? If you want to continue to develop with Java 6 using command-line, then you can modify the startup script for your favorite command environment. OpenJDK 7 for OS X Lion is based on OpenJDK sources. This solutions aims at delivering for Java enthusiasts and / or developers a working version of the next Java release for their Apple Mac.
If you download the .tar.gz for OpenJDK 11 directly from http://jdk.java.net/11/, there’s no obvious installation instructions (at least that I could find) on the OpenJDK website or in the .gz file. If you’ve done any fiddling with different JDK versions on MacOS before, you’ve probably come across the ‘/usr/libexec/java_home’ utility, which composes a number of useful things relating to the JDK that you’re currently using in your PATH. Click here for my previous article about this utility and answers to this StackOverflow post, which includes one of the most extensive and useful guides to running different JDK versions on MacOS that I’ve seen.
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/usr/libexec/java_home: This will show you where the current JDK home is, for example:
/usr/libexec/java_home -V: This lists all installed JDKs, which is shown below:
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To switch between JDKs, use /usr/libexec/java_home -v version (e.g. 10):
Knowing that your available JDKs are installed to /Library/Java/JavaVirtualMachines/ by default, moving the contents of the downloaded OpenJDK 11 dir from inside the .gz file to the same location would make sense.
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Once you’ve moved it there, java_home -V now shows the new JDK in place:
Updating my aliases to quickly switch versions in my .bash_profile, I now have:
Sourcing the .bash_profile (source .bash_profile) and then running each alias, now I’ve got OpenJDK 11 set up and ready to go!
Published at DZone with permission of Kevin Hooke, DZone MVB. See the original article here.
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