Change java version on Mac

To see which version of java is installed, do;

java -version

with an example of the output being;

java version "17.0.4" 2022-07-19 LTS

Java(TM) SE Runtime Environment (build 17.0.4+11-LTS-179)

Java HotSpot(TM) 64-Bit Server VM (build 17.0.4+11-LTS-179, mixed mode, sharing)

If we want to change the default version, first do;

/usr/libexec/java_home -V

an example of the output is;

Matching Java Virtual Machines (2):

    17.0.4 (x86_64) "Oracle Corporation" - "Java SE 17.0.4" /Library/Java/JavaVirtualMachines/jdk-17.0.4.jdk/Contents/Home

    11.0.15.1 (x86_64) "Oracle Corporation" - "Java SE 11.0.15.1" /Library/Java/JavaVirtualMachines/jdk-11.0.15.1.jdk/Contents/Home

/Library/Java/JavaVirtualMachines/jdk-17.0.4.jdk/Contents/Home

then if we wanted to change it, we would do;

export JAVA_HOME='/usr/libexec/java_home -v 11.015.1'

The above is untested.