to switch jre version

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Hi,
how can I to switch jre version for different applications requirement?
Is there some tools that works for this aim?

Thank's,

 

[Roedy Green]

how can I to switch jre version for different applications requirement?
Is there some tools that works for this aim?

Study the registry. Then patch. Other than that, just reinstall the
one you want current.

see http://mindprod.com/jgloss/registry.html

Also use explicit commands e.g.

set javadir="C:\j2sdk1.4.2_02"

%javadir%\bin\javac.exe ....