@echo off
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::  Set JAVA_HOME to current JDK  ::
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:: http://techdem.blogspot.com/2009/05/javahome-command-script.html
set KeyName=HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Development Kit
set Cmd=reg query "%KeyName%" /s
for /f "tokens=2*" %%i in ('%Cmd% ^| find "JavaHome"') do set JAVA_HOME=%%j

set JAVA_HOME
pause