Re: How to use Webstart?!
From: Andrew Thompson (SeeMySites_at_www.invalid)
Date: 03/09/04
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Date: Tue, 09 Mar 2004 12:26:28 GMT
On Tue, 09 Mar 2004 11:30:06 GMT, Geoff Cox wrote:
> On Tue, 09 Mar 2004 10:32:31 GMT, Andrew Thompson
>>On Tue, 09 Mar 2004 09:01:23 GMT, Geoff Cox wrote:
>>
>>> We have a Java app which is distributed both from a web site and via
>>> CDs. Now that J2RE is needed it looks as if Webstart might be the way
>>> to go as the J2RE is bigger than the previous JRE.
..
> Thanks for your reply - I have started reading the faq but am I
> correct in thinking that a user must have J2RE already installed on
> his/her computer in order to use Webstart?
Yes. To be honest, I do not know quite what
Sun means by J_2_RE, and searching their site
got me nowhere fast. But I did find this..
<http://java.sun.com/products/javawebstart/1.2/docs/developersguide.html#req>
1.2.2. That means that JWS will _not_
work on the broken and insecure MS VM
(if that is what you are asking)
But then, if your clients are using this
peice of dross, the best course of action
is to replace it _immediately_ with the Sun
plug-in (or if they are unwilling to do that,
then at the very _least_, they should disable
the MS VM).
My app. has various 'fall-back' methods.
On the install page,..
<http://www.physci.org/install/download.jsp>
I use the JavaVersionApplet to redirect any
browser that is using a VM lower than what
my app. can cater for (in my case, 1.4).
I shift them to a page that
links to the Sun download.
<http://www.physci.org/codes/oldjava.jsp>
Once the client has the plug-in, they
can return to the download page and
install it.
So, if your asking. 'Does the client need
the Java plug-in to do JWS?' the answer is
'Yes'.
If you are installing from CD, it _might_
be possible (not sure of the legalities)
to deliver the plug-in off the CD. If that
is the case you could follow a similar strategy
to what I have done.
Use the first 'index' page to check JRE version,
if OK, send them through to the download page,
if not, direct them to the 'install the plug-in'
page first.
HTH
-- Andrew Thompson * http://www.PhySci.org/ Open-source software suite * http://www.PhySci.org/codes/ Web & IT Help * http://www.1point1C.org/ Science & Technology
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