(Mac OS) JAVA version does not change

I have 2 JAVA version on my Macbook. I want to change version from 14 to 11. I found 2 solutions on the internet but both are not working.

My java -version result is

openjdk version "14.0.1" 2020-04-14
OpenJDK Runtime Environment (build 14.0.1+14)
OpenJDK 64-Bit Server VM (build 14.0.1+14, mixed mode, sharing)

1st Solution (https://stackoverflow.com/questions/21964709/how-to-set-or-change-the-default-java-jdk-version-on-os-x),
I run /usr/libexec/java_home -V then I got a result below,

Matching Java Virtual Machines (2):
14.0.1, x86_64:	"OpenJDK 14.0.1"	/Library/Java/JavaVirtualMachines/openjdk.jdk/Contents/Home
11.0.8, x86_64:	"Java SE 11.0.8"	/Library/Java/JavaVirtualMachines/jdk-11.0.8.jdk/Contents/Home

Then I did

export JAVA_HOME=`/usr/libexec/java_home -v 11.0.8`

After checking from java -version, The result is still 14.0.1

2nd solution (https://stackoverflow.com/questions/14702702/how-to-set-java-home-in-mac-permanently), I edit ~/.bash_profile file as below,

export JAVA_HOME=`/usr/libexec/java_home -v 11.0.8`

And I run command

source ~/.bash_profile
echo $JAVA_HOME

It shows the result,

/Library/Java/JavaVirtualMachines/jdk-11.0.8.jdk/Contents/Home

But when I check the result with java -version, It's still 14.0.1 as well

Install sdkman which takes care of the rather tedious command line voodoo you have to employ to try to make this happen. The problem is, JAVA_HOME is just an environment variable, it changes nothing - only tools that explicitly look for it (generally, maven and ant for example) will be affected by messing with it. When you type java on a mac, it runs /usr/bin/java, which is not a file you can change even as root. This java will then invoke the real java, and does not look at JAVA_HOME to get the job done: It is a softlink to /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java, and because it is in /System you can't change that either, not even as root.

That's why this is so hard, and why you want a nice tool (sdkman) to do it for you.

The removal of quotes around the JAVA_HOME and then setting the path variable variable worked for me (Mac OS Catalina):

export JAVA_HOME=/Library/Java/JavaVirtualMachines/openjdk.jdk/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH

If you need to switch between versions and already have the JDKs installed, you can adjust your bash profile with aliases that reset JAVA_HOME and reinitialize your PATH each time:

export JAVA_11_HOME=$(/usr/libexec/java_home -v11)
export JAVA_14_HOME=$(/usr/libexec/java_home -v14)

alias java11='export JAVA_HOME=$JAVA_11_HOME; export PATH=$JAVA_HOME/bin:$PATH'
alias java14='export JAVA_HOME=$JAVA_14_HOME; export PATH=$JAVA_HOME/bin:$PATH'

Then, after restarting your terminal session, you can switch back and forth:

$ java11
$ java -version

and

$ java14
$ java -version

Try export JAVA_HOME='/usr/libexec/java_home -v 11' (without the minor version), it outputs the right java -version for me on Mac.