如何使Mac Java_Home工具正常工作？

Question

How can i make java_home tool(ie /usr/libexec/java_home) to work on my mac?I am a mac newbie.Mac Java-home tool says unable to find JVM installed but JVM is installed on my machine and the java -version return true as shown below

    $ /usr/libexec/java_home -V
Unable to find any JVMs matching version "(null)".
Matching Java Virtual Machines (0):

Default Java Virtual Machines (0):

No Java runtime present, try --request to install

```$ java -version
openjdk version "11.0.2" 2019-01-15 LTS
OpenJDK Runtime Environment Zulu11.29+3-CA (build 11.0.2+7-LTS)
OpenJDK 64-Bit Server VM Zulu11.29+3-CA (build 11.0.2+7-LTS, mixed mode)

Answer 1

Open up Terminal.app (Applications >> Utilities >> Terminal)

Type: nano .profile

add this to the end of the .profile file:

JAVA_HOME=/Library/Java/Home
export JAVA_HOME;

Save and exit (ctrl-x and y to confirm)

--- edit

Only now I saw, you are using open jdk, try it:

Before setting the path make sure that java is installed by checking the directory

terminal > type ls /Library/Java/JavaVirtualMachines/

You will see java versions installed

Then in .bash_profile

JAVA_HOME=/Library/Java/JavaVirtualMachines/<version>.jdk/Contents/Home
export JAVA_HOME

terminal type source ~/.bash_profile to reload