When the javaDetect.bat script is run after a new CMD session is opened, the following error occurs:
Environment variable JAVA_VERSION not defined
To fix this error, the comment lines assigning to the JAVA_VERSION variable have been removed.
Click to see the code.
```bash
@ECHO OFF
SET __COMPAT_LAYER=RunAsInvoker
:: Export java settings from registry to a temporary file
START /W REGEDIT /E %Temp%\java.reg "HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft"
IF NOT EXIST "%Temp%\java.reg" (
START /W REGEDIT /E %Temp%\java.reg "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft"
)
IF NOT EXIST "%Temp%\java.reg" (
ECHO Java NOT installed
EXIT /b 1
)
:: Find java location
FOR /F "tokens=1* delims==" %%A IN ('TYPE %Temp%\java.reg ^| FIND "INSTALLDIR"') DO SET JAVA_HOME=%%B
SET JAVA_HOME=%JAVA_HOME:"=%
SET JAVA_HOME=%JAVA_HOME:\\=\%
SET JAVA_HOME
:: Get java version
FOR /F "tokens=1* delims==" %%A IN ('TYPE %Temp%\java.reg ^| FIND "CurrentVersion"') DO SET JAVA_VERSION=%%B
SET JAVA_VERSION=%JAVA_VERSION:"=%
SET JAVA_VERSION
SET JAVA_VERSION=%JAVA_VERSION:.=%
SET JAVA_VERSION=%JAVA_VERSION:_=%
SET /A JAVA_VERSION=%JAVA_VERSION%
FOR /f tokens^=2-5^ delims^=.-_^" %%j in ('%JAVA_HOME%\bin\java.exe -fullversion 2^>^&1') do set "JAVA_VERSION=%%j%%k%%l%%m"
:: Delete temporary file
DEL %Temp%\java.reg /S /Q > NUL 2>&1
set JAVA_VERSION
:: Check java version compatibility
IF %JAVA_VERSION% LSS 16020 (
ECHO.
ECHO YOU NEED AT LEAST JAVA WITH VERSION 1.6.0_20 -- this is just an example echo.
GOTO :EOF
)
PAUSE
```
When the javaDetect.bat script is run after a new CMD session is opened, the following error occurs:
To fix this error, the comment lines assigning to the
JAVA_VERSIONvariable have been removed.Click to see the code.
```bash @ECHO OFF SET __COMPAT_LAYER=RunAsInvoker :: Export java settings from registry to a temporary file START /W REGEDIT /E %Temp%\java.reg "HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft" IF NOT EXIST "%Temp%\java.reg" ( START /W REGEDIT /E %Temp%\java.reg "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft" ) IF NOT EXIST "%Temp%\java.reg" ( ECHO Java NOT installed EXIT /b 1 ) :: Find java location FOR /F "tokens=1* delims==" %%A IN ('TYPE %Temp%\java.reg ^| FIND "INSTALLDIR"') DO SET JAVA_HOME=%%B SET JAVA_HOME=%JAVA_HOME:"=% SET JAVA_HOME=%JAVA_HOME:\\=\% SET JAVA_HOME :: Get java version FOR /F "tokens=1* delims==" %%A IN ('TYPE %Temp%\java.reg ^| FIND "CurrentVersion"') DO SET JAVA_VERSION=%%B SET JAVA_VERSION=%JAVA_VERSION:"=% SET JAVA_VERSION SET JAVA_VERSION=%JAVA_VERSION:.=% SET JAVA_VERSION=%JAVA_VERSION:_=% SET /A JAVA_VERSION=%JAVA_VERSION% FOR /f tokens^=2-5^ delims^=.-_^" %%j in ('%JAVA_HOME%\bin\java.exe -fullversion 2^>^&1') do set "JAVA_VERSION=%%j%%k%%l%%m" :: Delete temporary file DEL %Temp%\java.reg /S /Q > NUL 2>&1 set JAVA_VERSION :: Check java version compatibility IF %JAVA_VERSION% LSS 16020 ( ECHO. ECHO YOU NEED AT LEAST JAVA WITH VERSION 1.6.0_20 -- this is just an example echo. GOTO :EOF ) PAUSE ```