This is a set of tools that you need to develop applications in Java. It is used to run any java apps you write and java applications you might download. This is the part of Java that actually runs Java applications and applets. You may understand that they are part of Java but may also wonder what the difference is between them. When working with and installing Java, you may see references to JRE and JDK and wonder what these are. In the example above, it would be 18.0.1.1. You should get a response showing the same version as the java version you just installed. You will see a command not found message or something similar if it is not installed. If you already have it installed, it will come back with the current version on your machine. You can check if you currently have Java installed with the following command. You could proceed with the new install if there is a more recent version and you wish to upgrade. If there is another version, you may want to take note of the version. There’s a chance it could have already been installed by another application. Before starting the installation, I first recommend checking to see if you already have a version of Java on your Mac. Once you install Homebrew, you are now ready to install Java. You can take a look here for more information on installing Homebrew. Once it starts, it will walk you through the installation, and you will only need to answer a few simple questions. You can install it using the following command. If it says something like command not found, you do not have it installed and will need to install it. If the major version of the available JDK is unique you can just use the major version, like: export JAVA_HOME=`/usr/libexec/java_home -v 1.It will give you a response showing the version if you already have it installed. For example, I will choose the 1.8.0_121 version to be my default JDK.

Matching Java Virtual Machines (3):ĩ, x86_64: 'Java SE 9' /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Homeġ.8.0_121, x86_64: 'Java SE 8' /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Homeġ.7.0_80, x86_64: 'Java SE 7' /Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Homeįrom the list above pick which version you want to be the default JDK. On my machine I have the following version of Java. The command will print out something like the following depending on the available JDK in your computer. First you need to run /usr/libexec/java_home -V command to get the list of installed JDK. In this post you will learn how to set the default JAVA_HOME in Mac OS X when you have more than one JDK installed in your computer.

Macos change java version