With this set up the "system" Java version remains Java 8, which will be used by all. If, in the example above, Java 11 is moved into a directory in the user's home directory, the aliases could look like the following:Īlias j11="export JAVA_HOME=/Users/mrr39/java/jdk-11.0.1.jdk/Contents/Home java -version" If you'd still like to create aliases to easily change Java versions in the shell, you can simply provide the path to the Home directory for the versions no longer stored in the JavaVirtualMachines directory. And they do not need the JDKs installed anywhere in particular.
In particular, IDEs make running different versions for development very easy, as you just tell the IDE which JDK to use. But if you simply want to develop in a different version of Java or want to run a Java program from the command line with a different version, you could install those other versions anywhere. The exception is that any app run by macOS that needs to run on Java will expect to find and run the newest version of it in JavaVirtualMachines.
Since JDKs and JREs are self contained, they do not need to be installed in the JavaVirtualMachines directory. NetBeans 8.2 cannot run on Java 11.Īlternative to Using java_home Exclusively Furthermore, there's no way to force java_home to choose a specific version as the default that would be returned by running the java_home command by itself.Ī specific example of this problem is trying to run NetBeans 8.2 when Java 11 is installed. This is a problem if the app cannot run on a newer version of Java. By default, the OS will run the newest version of Java in the JavaVirtualMachines directory. While the above method works well when running Java from the command line, it will not work well for any application launched in the OS. bash_profile to allow quickly switching between the versions:Īlias j11="export JAVA_HOME=$(/usr/libexec/java_home -v 11) java -version"Īlias j8="export JAVA_HOME=$(/usr/libexec/java_home -v 1.8) java -version" The following aliases could be created in the. Let's say a user has both Java 8 and Java 11 installed. The java_home executable has access to JDKs & JREs installed here:Ĭommand to list all JDKs/JREs in the JavaVirtualMachines directory: One way to do this is through a combination of using the java_home executable and aliases, but this comes with some pitfalls you need to be aware of. The version of Java being used is determined by setting the JAVA_HOME system variable. MacOS allows installing different versions of Java.
0 kommentar(er)
