why sun does not provide a J2SE wihout installer ?

But when you say you need to use different versions, what does that have to do with installation? That has more to do with environment variables. I do not recommend setting the environment variables via the OS especially Windows. I make command launchers and exe launchers with the specific version I want to run. A sophisticated one can use the Windows registry settings. For most I simply set the path for just a particular cmd launch.

Typical example

set JAVA_HOME=c:\j2sdk1.5

set PATH=%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin;C:\apache\xml-batik\resources;./schemas/mathml2

set JMFHOME=C:\JMF2.0

set JARPATH=.;

set BATIKPATH=./lib

set Xj3DPATH=c:/Xj3d/x3d

set CLASSPATH=./classes;./lib/TR/MathML2/dtd/java;./lib/xalan.jar;./lib/js.jar;./lib/batik-all-1.5.1.jar;./lib/js.jar;

rem ;./lib/xercesImpl.jar;./lib/xml-apis.jar;./lib/xmlParserAPIs.jar

java -ms128m -mx256m -server -cp %CLASSPATH% com.neuralworks.physics.Academy

if ERRORLEVEL GOTO dopause

GOTO endit

dopause:

java -version

pause

endit:

in 'run Academy.cmd'

Martin3 at 2007-7-6 18:45:18 >