Develop Reference

Appium Setup - Determining what jdk version I am using on mac

I am following a guide to set up Appium on my mac. It is asking me to set my JAVA_Home variables. They are using: export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_192.jdk/Contents/Home
They have instructed me to replace jdk1.8.0_192.jdk with my own version of JDK.
How would I find out what my JDK is?
I have tried using: java -version
java version "11.0.11" 2021-04-20 LTS
I am unsure how to translate that into the correct JDK.
Thanks in advance for any help

For the currently used jdk version;
/usr/libexec/java_home -V
You can use this command.

I was able to find the jdk version using the below command:
ls /Library/Java/JavaVirtualMachines

Elasticsearch: could not find java in bundled jdk at .../jdk/bin/java

When I try to run .bin/elasticsearch, I get the following error:
could not find java in bundled jdk at /home/ubuntu/Elastic
Search/elasticsearch-7.8.0/jdk/bin/java
I have absolutely no idea what's going on. I know this topic has been created before, but I haven't found a way to fix. For java -version I get:
openjdk version "1.8.0_265"
OpenJDK Runtime Environment (build 1.8.0_265-8u265-b01-0ubuntu2~20.04-b01)
OpenJDK 64-Bit Server VM (build 25.265-b01, mixed mode)
Can anyone help me please? Thank you!

The most probable reason for the above error is that JAVA_HOME is not set
To display JAVA_HOME variable path, run this command echo $JAVA_HOME
If nothing appears then follow the below steps:
To see all the java versions installed in Ubuntu, use this command:
sudo update-alternatives --config java
Set your java path using this. - export JAVA_HOME=<YOUR-JAVA-PATH>

I had the similar problem on linux, when I was running elasticsearch using
sh elasticsearch
I got the error
Elasticsearch: could not find java in bundled jdk at .../jdk/bin/java
Then I referred to the official document
and set ES_JAVA_HOME environment variable.
After running elasticsearch again, I got the following message and it ran successfully
ignoring JAVA_HOME=/project/jdkForElasticSearch/; using ES_JAVA_HOME
Note: After setting environment variable, restart your terminal to reflect the updated value in it.

Requirements check failed for JDK 8 ('1.8.*')! Detected version: 13.0.2

Help me please! I don't know what else to do ... I've read all the help that talks about it and so far I haven't been able to solve it!
Tiagos-iMac:app tiago$ cordova run android Checking Java JDK and
Android SDK versions ANDROID_SDK_ROOT=/Users/tiago/Library/Android/
(recommended setting) ANDROID_HOME=/Users/tiago/Library/Android/
(DEPRECATED) Requirements check failed for JDK 8 ('1.8.*')! Detected
version: 13.0.2 Check your ANDROID_SDK_ROOT / JAVA_HOME / PATH
environment variables. Tiagos-iMac:app tiago$
How can I solve this? Please help!
.bash_profile
export JAVA_HOME=$(/usr/libexec/java_home)
PATH=$PATH:$HOME/Library/Android/Sdk/emulator
PATH=$PATH:$HOME/Library/Android/Sdk/tools
PATH=$PATH:$HOME/Library/Android/Sdk/tools/bin
PATH=$PATH:$HOME/Library/Android/Sdk/platform-tools
export ANDROID_SDK_ROOT=$HOME/Library/Android/
PATH=$PATH:$HOME/Library/Android/Sdk/emulator
PATH=$PATH:$HOME/Library/Android/Sdk/tools
PATH=$PATH:$HOME/Library/Android/Sdk/tools/bin
PATH=$PATH:$HOME/Library/Android/Sdk/platform-tools
export ANDROID_HOME=$HOME/Library/Android/
export ANDROID_AVD_HOME=~/.android/avd
export PATH=$PATH:/opt/gradle/gradle-6.1/bin
Java
Tiagos-iMac:~ tiago$ java -version
java version "13.0.2" 2020-01-14
Java(TM) SE Runtime Environment (build 13.0.2+8)
Java HotSpot(TM) 64-Bit Server VM (build 13.0.2+8, mixed mode, sharing)
Tiagos-iMac:~ tiago$

Uninstall any previous Java versions, then install required JDK

If you are on MacOSX Catalina^ use brew to install JENV to switch your java environment; and you are using Zsh you may need to run this command:
echo 'eval "$(jenv init -)"' >> ~/.zshrc
and restart your session (Terminal / Hyper etc.) and then try switching your java version, eg:
jenv global 1.8
You can then test that out with
java -version

In my case, _JAVA_OPTIONS variable was set in the System Variables. Removing this fixed the issue.

Change JAVA_HOME variable in mac os for ionic

I have made changes by using below command to set JAVA_HOME
rajendras-mbp:demo username$ /usr/libexec/java_home
/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home
rajendras-mbp:demo username$ export JAVA_HOME="`/usr/libexec/java_home -v '1.8*'`"
rajendras-mbp:demo username$ java -version
java version "1.8.0_161"
Java(TM) SE Runtime Environment (build 1.8.0_161-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)
It sets JDK 1.8 when i checked java version
But after i hit the ionic cordova run android it's throwing below error
ANDROID_HOME=/Users/username/Library/Android/sdk
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home
(node:2191) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): CordovaError: Requirements check failed for JDK 1.8 or greater
(node:2191) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
[23:27:26] lint finished in 3.77 s
What to change? How to set 1.8 JDK to ionic ?

I know this is an old question but I would like to share how I solved this incase it might help others in the future.
I had both java 1.8 and the latest 14.0.2.
I solved this on Mac OS by setting the java_home version to 1.8
# Create a JAVA_HOME variable, determined dynamically
export JAVA_HOME=$(/usr/libexec/java_home -v 1.8)
# Add that to the global PATH variable
export PATH=${JAVA_HOME}/bin:$PATH
Then source ~/.bash_profile and java -version
Output:
java version "1.8.0_271"

Add the following to both ~/.profile and ~/.bashrc (/etc/bashrc, then ~/.bashrc) for your USER:
export IDEA_SDK=$(/usr/libexec/java_home -v 1.8)

Setting Java home enviroment variable in OSX Mavericks

I am having issues with my Java path.
I have installed the latest version of Java 1.7.0_51. When I open the Java control panel it tells me "Your system has the recommended version of Java."
However when I go to terminal and type java -version I get
java version "1.6.0_32"
So after searching around I came across this SO Question which tells me that my Java home environment variable needs to be set.
I then opened the bash_profile file and added the below line to the top of the file, above my Python path info.
export JAVA_HOME=`/usr/libexec/java_home -v 1.7.0_51`
# Setting PATH for Python 2.7
# The orginal version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/2.7/bin:${PATH}"
export PATH
NOTE: I have tried this with both -v 1.7.0_51 and -v 1.7
I save the file and recheck in terminal but it is still showing
java version "1.6.0_32"
when I restart Terminal I do however see
Last login: Wed Feb 19 23:32:19 on ttys000
Unable to find any JVMs matching version "1.7".
localhost:/ user$
Note: Unable to find any JVMs matching version "1.7".
So it is trying to look for my 1.7, but just not finding it.
What am I doing wrong?

Check whether there is an old version existed in the path
echo $PATH
Then set the java 1.7 bin directory.
export PATH=/usr/libexec/java_1.7_home/bin:$PATH
Then try to type in "java -version" in terminal to check the version

Ok, I think this must be specific to me. As above the Java control panel was saying that java 7 was installed. Also when i tried
/Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java -version
I would get
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
But no mater what way I installed the JDK it would not work. It just didn't seem to appear anywhere on my machine. I still don't know why, but uninstalling (by simply deleting the 1.6 folder) the existing Java 6 from my machine and once again installing Java 7 JDK eventually fixed it.
Please give the up-votes to #diaz994 above.