Develop Reference

JAVA_HOME is set to an invalid directory- vs code

I have completely followed Setting up the development environment for the react-native project, now when I am running the first app from Andriod studio run BUTTON it installs and runs perfectly. The problem comes when I run the command yarn react-native run-android it throws the following error:
info JS server already running
info Installing the app...
ERROR: JAVA_HOME is set to an invalid directory: C:\Program Files\Java\jdk-15.0.1;C:\Program Files\Java\jdk-15.0.1\bin;
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation.
error Failed to install the app. Make sure you have the Android development environment set up:
https://reactnative.dev/docs/environment-setup. Run CLI with --verbose flag for more details.
Error: Command failed: gradlew.bat app:installDebug -PreactNativeDevServerPort=8081
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this co
snapshot is here
My jdk path:
C:\Program Files\Java\jdk-15.0.1;
C:\Program Files\Java\jdk-15.0.1\bin;
My question is:
If the jdk path is invalid then why it is running in android studio?

It seems the terminal caches the earlier environment variables.
Before moving ahead make sure you have already changed the correct path for JAVA_HOME.
Now, Open Visual code and close the terminal, and reopen it (ctrl + ~)
error should be gone

You should edit your path as "C:\Program Files\Java\jdk-15.0.1" bin is not required.
To set JAVA_HOME
1-Search for Environment Variables
2-Under system variables click new
3-In the variable name enter JAVA_HOME, in the variable value enter the JDK path which is "C:\Program Files\Java\jdk-15.0.1"

I was getting this error in flutter. I deleted the "JAVA_HOME" "C:\Program Files\Java\jre7" value that I wrote earlier in the system variables section under the environment variables menu. I ran the terminal again and ran "flutter doctor --android-licenses" in the terminal. Problem solved.

Windows 10 Gradle: JAVA_HOME is set to an invalid directory

I was trying to run ./gradlew bootRun in both Git Bash and PowerShell, and got this error: ERROR: JAVA_HOME is set to an invalid directory: C:\Program Files\Java\jre1.8.0_121
The gradlew file is inside the project directory that cloned from git. It is a practice project from Spring official guide. There's also a gradle.bat file with these lines:
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%\bin\java.exe
I also tried to run Eclipse EE, which got no problem. The environment setting should be no problem.

In addition to Ernest's answer, the JAVA_HOME it wants is the actual directory, not the bin folder like the path wants for javac. Took me a while to work that out

Looks like your JAVA_HOME variable resolves to a JRE installation directory. But as you're talking about Gradle, you're surely trying to build/compile code.
If you have a JDK installed, change JAVA_HOME variable to point to it. The folder name should typically start with "jdk". Otherwise, you have to install a Java Development Kit.
You could also try exporting the variable manually before running gradle on the command line (SET JAVA_HOME=<path to the jdk directory>)

Please set the JAVA_HOME variable location to the path to JDK instead of JRE.
If that is correctly set, check the environment variables in Edit mode.
In my case, I found that a semicolon was appended to the JAVA_HOME environment variable at the end.
To check:
Open the environment variables list.
Select the variable and click Edit.
Remove the semicolon and Save.
Closed the settings and checked the path in cmd using echo %JAVA_HOME%, and ran gradle -v.
It ran perfectly.
Note: Check the variable value by clicking the Edit button as we cannot see the semicolon instead. Windows adds a semicolon so that the same variable can be used as the path to multiple locations.
Added picture for reference:

Found a solution I hadn't seen before in my googling.
Open up your gradlew.bat in some editor. On line 34-ish you will see this:
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%\bin\java.exe
if exist "%JAVA_EXE%" goto init
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
add this line to the error message: echo %JAVA_EXE%
so it looks like this
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo %JAVA_EXE%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
Then run your gradlew.bat file.
The error should now appear again, but with the added echo of the path to JAVA_EXE. In my case it was echoing \bin\java.exe and NOT the full path C:\...\Java\jre1.8.0_251\bin\java.exe
to fix this, I changed
set JAVA_EXE=%JAVA_HOME%\bin\java.exe
to
set JAVA_EXE=C:\...\Java\jdk1.8.0_261\bin\java.exe
The value is now hardcoded, true, but it worked. I don't know why gradle doesn't concat the variable name into the path.

I've found myself with the same issue, although my JAVA_HOME was set to the correct JDK path.
However Windows 10 appended a semicolon at the end of the path.
This way the JAVA_HOME variable would work anywhere but not with Gradle.
I'm posting this, because it might spare someone else the time I've been looking for it ;)

If you didn't have admin rights, override the JAVA_HOME in User Environment Variable. Avoid typo by selecting the Java home folder. You must include folder before the bin ( do not include /bin) for java home.

If none of the above works open the gradle.bat file in an editor and make sure that IT is correct , in my case gradle was the problem

Cannot locate java installation error for logstash

I downloaded Logstash-1.5.0 on Windows 8.1 and tried to run it in the command prompt.
First I checked the java version.
Then changed the directory to logstash-1.5.0/bin
then entered the command logstash -e 'input { stdin { } } output { elasticsearch { host => localhost } stdout { } }' it gave the following error:
Cannot locate java installation, specified by JAVA_HOME
The Logstash folder is on C: and the version of Java is 1.7.0_25. I've set the JAVA_HOME environmental variables to the jdk /bin directory, but still it doesn't work.
I'm new to Logstash. Can somebody tell me in detail why this happens and help me fix it?

Set the JAVA_HOME and PATH environmental variables like this:
JAVA_HOME = C:\Program Files\Java\jdk1.7.0_25
PATH = C:\Program Files\Java\jdk1.7.0_25\bin

In my case the problem was that I set the JAVA_HOME variable with a space in the end:
"set JAVA_HOME=c:\Programs\Java "
instead of
"set JAVA_HOME=c:\Programs\Java"
And logstash couldn't figure that out :) Removing the space fixed the issue.

On Windows when you change environment over the system settings, you have to close and reopen the command shell, before the changes take effect.
Step by step:
Locate your java JRE installation directory you want to use. For example: "C:\Program Files\Java\jre7"
Open start menu right click computer and select settings. In System settings window on right side click on "Extended Systemsettings".
On Tab extended select environment variables, add your JAVA_HOME variable to your path and hit OK.
Open command shell and check environment by entering "set" and hit enter. Look if JAVA_HOME is set.
If your JAVA_HOME is now correctly set, logstash should work.

JAVA_HOME is not recognized as an internal/external command

I've tried just about everything but it will not recognize it.
I have the latest version of JDK installed, the path is located at "C:\Program Files\Java\jdk1.8.0_25". This is what I'm using for my "variable value" field when I add the new variable "JAVA_HOME"..
I also have a %JAVA_HOME%\bin; in my path variable. I've restarted multiple times, making small changes..
Help me :(
Keep in mind I don't have much of a clue of what I'm doing.. So I could be going about it completely wrong.. Running it in cmd

Change the path value %JAVA_HOME%\bin, instead of set this
C:\Program Files\Java\jdk1.8.0_25\bin
After setting that, open command prompt and check whether you have set JAVA_HOME correctly.
echo %JAVA_HOME%
java
echo %JAVA_HOME% will print the location where java installed and java will show the usage of java.
See here how to set JAVA_HOME

Webstorm desktop launcher

I'm trying to get a working desktop launcher for Webstorm (applicable to any JetBrains product, however.) I've tried using the built-in menu "Add desktop launcher" in both Xubuntu and Lubuntu with no dice.
Running ./webstorm.sh from a terminal in the application's folder works fine.
If I add the option to the .desktop file to run in terminal I get an error message:
ERROR: cannot start WebStorm.
No JDK found. Please validate either WEBIDE_JDK, JDK_HOME or JAVA_HOME environment variable >points to valid JDK installation.
Press Enter to continue.
If I open a terminal and do javac -version I get a response, indicating my path is set correctly.
What gives? I am baffled as to what I'm doing wrong.

Set JAVA_HOME in your ~/.profile like this:
export JAVA_HOME=/usr/lib/jvm/java-7-oracle/
Then restart your system (or just X-Windows using sudo /etc/init.d/gdm restart).