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run a Java-6-RCP-app with a Java-5-JRE? [message #466642]

Mon, 23 April 2007 15:45

Eclipse User

Originally posted by: unidad.gmx.net

Hi!

I've developed a standalone-RCP-Application
with Java 6.0.

So I've the binary relase of my "product".
Is there a way to transform this binary release, so that it runs with a
Java-5.0-JRE or even a Java-1.4.2-JRE?

Regards, Ralf

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Re: run a Java-6-RCP-app with a Java-5-JRE? [message #466651 is a reply to message #466642]

Tue, 24 April 2007 04:33

Eclipse User

Originally posted by: vedantaulises.gmail.com

Hi,,
do you use java 6.0 features that is not in java 1.4 (or lower version of 6.0)?

You could do the check by recompiling them with 1.4

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Re: run a Java-6-RCP-app with a Java-5-JRE? [message #466730 is a reply to message #466651]

Tue, 24 April 2007 10:08

Eclipse User

Originally posted by: unidad.gmx.net

Vedanta Ulises schrieb:
> Hi,,
> do you use java 6.0 features that is not in java 1.4 (or lower version of 6.0)?
>
> You could do the check by recompiling them with 1.4

Yes I do!

So, the byte-code 6.0 is not compatibel with a 1.4-JRE?

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Re: run a Java-6-RCP-app with a Java-5-JRE? [message #466767 is a reply to message #466730]

Tue, 24 April 2007 15:14

Olivier Thomann

Messages: 518
Registered: July 2009

Senior Member

Ralf Maurer a écrit :
> So, the byte-code 6.0 is not compatibel with a 1.4-JRE?
This is true for all versions. Once you compiled with a target, you
cannot run on a lower target since the major/minor version relative to
the target you used to generate the code is incompatible with lower JREs.
This is unrelated to the source you are compiling. Even if you don't use
any of the 1.6/1.5 features, if you compile with the target 1.6, your
generated .class files won't run on a 1.4 VM.
--
Olivier

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