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JDK version switch on MacOS
1. Check the current version out of curiosity
> /usr/libexec/java_home -V
Expected result should be similar to
Matching Java Virtual Machines (2):
9.0.4, x86_64: "Java SE 9.0.4" /Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home
1.8.0_162, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_162.jdk/Contents/Home
/Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home
2. Update your .bash_profile with shortcuts to swith between versions easily:
from whenever you are, go to you home dir
> cd
> vi .bash_profile
add lines like:
alias j9="export JAVA_HOME=`/usr/libexec/java_home -v 9`; java -version"
alias j8="export JAVA_HOME=`/usr/libexec/java_home -v 1.8`; java -version"
save and exit (in vi it's `:wq`)
update your bash_profile with
> source .bash_profile
3. You are ready to go.
____
courtesy of https://www.kevinhooke.com/2017/10/05/switching-java-versions-on-mac-os/
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