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If your JDK was installed using Homebrew or MacPorts, please uninstall your JDK using the same way. Or $ cd /Library/Java/JavaVirtualMachines The Mac includes a Java Preferences App (Applications -> Utilities -> Java Preferences) that lets you set the preferred order of Java versions to run when you. With UPD4 (and some earlier updates), Java 6 is installed as well, but it is not set as the default JDK. $ sudo rm -rf /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk Mac OSX 10.5 comes with Java installed by default and includes multiple versions. If you decide to remove a JDK version, just simply delete its installation folder. export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)Īppending following line to your ~/.profile file will switch system's JDK to 1.8 version. Java(TM) SE Runtime Environment (build 1.8.0_121-b13) Using java -version or javac -version to show the JDK version used by system. Set java version as default (needs root permissions): sudo update-java-alternatives -set /path/to/java/version. List all java versions: update-java-alternatives -list. To switch between installed java versions, use the update-java-alternatives command. $ cd /Library/Java/JavaVirtualMachinesģ How to check which JDK version is currently used by Mac OS Apt-get wont overwrite the existing java versions. Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/HomeĪbove java_home -v command has already told you where JDKs were installed. Output after executing above command may be similar with following text, which means there was two versions of JDK installed, 1.8.0_121 and 1.7.0_79. The java_home -v command will list all JDKs already installed in your Mac OS.

That’s why this article will indicate the required steps to make it work like a charm.Tips on how to uninstall JDK or Java SE in Mac OS X.ġ How to see JDK versions already installed Unfortunately, the steps in  are not enought when you work with gradle or maven. JEnv is a cool tool that helps you switch between different java versions in your development machine. JEnv is a command line tool to help you forget how to set the JAVA_HOME environment variable jenv.be To help with that work jEnv is a tool that you must use. One way to switch Java’s version is setting the JAVA_HOME env-var to the installation directory of the desire version. It might be very common to require more than one Java version on your machine, switching from Java 8, to Java 11 or Java 17, or any other version, while you are working on different projects or applications.

In Sept 2018 Java 11 was released and in Sept 2021 Java 17 will be released. Every 6 months there is a new Java version (with smaller changes or new preview features) and every 3 years there is an LTS (Long Term Support) version which enables officially most of the features implemented on previews versions. Since some years ago, Java has changed the version cadence to more frequent releases.