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From "Shapira, Yoav" <>
Subject RE: JSDK/JRE
Date Wed, 28 May 2003 19:51:15 GMT

This should be in the FAQ: I'm sure Senor Funk will add it to soon enough.  The question has been answered
in the archives several times.

Right now, tomcat needs the JDK in order to compile JSPs into bytecode.
If you don't use JSPs or precompile them, you can get away with just the
JRE.  There is a licensing issue in JDK vs. JRE.  But there's also the
issue of once you're running with a JRE, not JDK, you have not fulfilled
the tomcat installation requirements and so are less likely to receive
accurate support from this list or other sources.

Yoav Shapira
Millennium ChemInformatics

>-----Original Message-----
>From: Jason Bainbridge []
>Sent: Wednesday, May 28, 2003 2:27 PM
>To: Tomcat Users List
>Subject: Re: JSDK/JRE
>I believe there are licensing issues with distributing the JDK but not
>the JRE, although theoretically you could just get the client to
>JDK I really don't see the point of that myself...
>Do you use JSP's in your webapp? If you do I think if you pre-compile
>them prior to distribution you should be able to use a JRE, you just
>set JAVA_HOME to point to the right spot. If you only use servlets then
>JRE should work fine.
>However having said that the JDK contains different JVM's one optimised
>client side applications eg. Swing based ones and another for server
>applications like Tomcat, I am yet to fully investigate the benefits of
>however, maybe someone else on the list can provide some further
>Jason Bainbridge
>KDE Web Team -
>On Thu, 29 May 2003 02:15, Noel Rappin wrote:
>> Sorry if this is an FAQ, but I can't find the exact information
>> I see that Tomcat requires a JDK, not a JRE to enable compilation of
>> pages.  Is there any reasonable way to run off a JRE?  Are there any
>> license issues involved in distributing the JDK as part of a web
>> application instead of the JRE (we actually distribute the web
>> application, so it's not a question of just having one copy on our
>> server)?   How do other people manage this in practice?
>> Thanks,
>> Noel Rappin
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