JavaDetect

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@ECHO OFF

:: Export java settings from registry to a temporary file
START /W REGEDIT /E %Temp%.\java.reg "HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft"



:: 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%

:: Delete temp file
@DEL %Temp%.\java.reg /S /Q > NUL 2>&1

:: 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
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