@Echo Off & Title Java Runtime Version Checker By Elektro
(Chcp 1252)1>NUL & :: Spanish Latin ISO.
 
:: Registry Settings.
Set "Registry.Root=HKEY_LOCAL_MACHINE"
Set "Registry.Key=SOFTWARE\JavaSoft\Java Runtime Environment"
Set "Registry.Value.CurrentVersion=CurrentVersion"
Set "Registry.Value.FamilyVersion=FamilyVersion"
Set "Registry.Value.BrowserVersion=BrowserJavaVersion"
 
:: String Variables to store results.
Set "Java.CurrentVersion="
Set "Java.FamilyVersion="
Set "Java.BrowserVersion="
 
:: Change working directory.
PUSHD "%SystemRoot%\System32"
 
:: Iterate the Java registry subkeys.
For /F "Tokens=1,2,*" %%a In (
	'.\Reg.exe "Query" "%Registry.Root%\%Registry.Key%" /T "REG_SZ"'
) Do (
	(
		(	:: Retrieve the Java Runtime Version.
			Echo "%%a" | Find /I "%Registry.Value.CurrentVersion%"
		) && (
			Set "Java.CurrentVersion=%%c"
		)
 
		(	:: Retrieve the Java Runtime Family Version.
			Echo "%%a" | Find /I "%Registry.Value.FamilyVersion%"
		) && (
			Set "Java.FamilyVersion=%%c"
		)
 
		(	:: Retrieve the Java Runtime Family Version.
			Echo "%%a" | Find /I "%Registry.Value.BrowserVersion%"
		) && (
			Set "Java.BrowserVersion=%%c"
		)
	)1>Nul
)
 
:: Print Info.
Echo.Java Runtime Current Version: %Java.CurrentVersion%
Echo.Java Runtime Family  Version: %Java.FamilyVersion%
Echo.Java Runtime Browser Version: %Java.BrowserVersion%
 
:: Terminate execution.
POPD & :: Restore working directory.
Pause&Exit /B 0

Java Runtime Current Version: 1.7
Java Runtime Family  Version: 1.7.0_51
Java Runtime Browser Version: 10.51.2
Presione una tecla para continuar . . .

@Echo OFF
 
:: Este valor lo obtenemos del registro de Widnows con el Script de antes, 
:: o también llamando a la aplicación "java.exe" pasándole el parámetro "-version".
Set "Java.FamilyVersion=1.7.0_51"
 
:: Obtengo el número de la versión.
Set "Installer.Version=%Java.FamilyVersion:~2,1%"
 
:: Obtengo el número de la actualización.
(Echo "%Java.FamilyVersion%" | Find "_")1>NUL && (
	For /F "Tokens=2 Delims=_" %%# In ("%Java.FamilyVersion%") Do (
		Set "Installer.VersionUpdate=u%%#"
	)
)
 
Echo JavaRE Family Ver.   = %Java.FamilyVersion%
Echo JavaRE x86 Installer = jre-%Installer.Version%%Installer.VersionUpdate%-windows-i586.exe
Echo JavaRE x64 Installer = jre-%Installer.Version%%Installer.VersionUpdate%-windows-x64.exe
Echo.
 
Pause&Exit /B 0

JavaRE Family Ver.   = 1.7.0_51
JavaRE x86 Installer = jre-7u51-windows-i586.exe
JavaRE x64 Installer = jre-7u51-windows-x64.exe

@Echo OFF & SetLocal EnableDelayedExpansion
 
Set "Installer.Name=jre-7u51-windows-x64.exe"
set "JRE.Currentversion=825" & REM 8 update 25
 
REM hacer eso por cada instalador que haya en el directorio...
For /F "Tokens=2 Delims=-" %%# In ("%Installer.Name%") do (
 
	set "versionFix=%%#"
	Set "versionFix=!versionFix:u=!" & Rem Elimino el caracter "u"
 
	If !versionFix! LEQ %JRE.Currentversion% (
		Echo !VersionFix!: la version del instalador es igual o menor que la version actual de JavaRE.
	else
                Start /W "Java" "%Installer.Name%" /s /v /qn MOZILLA="1" REBOOT="Suppress" JAVAUPDATE="0" EULA="1"
	)
 
)
 
Pause&Exit /B 0