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download to have support at least for old ver. 1.2 java version JDK [message #898580]

Thu, 26 July 2012 12:51

Eclipse User

what latest eclipse version can download to have support at least for old ver. 1.2 java version JDK? can same time have support for JDK 7? can add jdk eg 1.2(old) if no support?

Re: download to have support at least for old ver. 1.2 java version JDK [message #898658 is a reply to message #898580]

Fri, 27 July 2012 02:19

Eclipse User

On 26.07.2012 18:51, Leonidas Savvides wrote:
> what latest eclipse version can download to have support at least for
> old ver. 1.2 java version JDK? can same time have support for JDK 7?
> can add jdk eg 1.2(old) if no support?
What exactly do you mean by "support"? The latest version (JUno) can
generate class files that are compatible with 1.2.

Dani

Re: download to have support at least for old ver. 1.2 java version JDK [message #898673 is a reply to message #898658]

Fri, 27 July 2012 03:01

Eclipse User

I MEAN IF I HAVE A JAVA SE/EE PROJECT, eclipse can compile/run/appear output...

Are you sure? where can found this jdk min info? I think is 1.3 jdk the min...for Juno or indigo... where find it...?

[Updated on: Fri, 27 July 2012 03:12] by Moderator

Re: download to have support at least for old ver. 1.2 java version JDK [message #898676 is a reply to message #898673]

Fri, 27 July 2012 03:21

Eclipse User

On 27.07.2012 09:01, Leonidas Savvides wrote:
> I MEAN IF I HAVE A JAVA SE/EE PROJECT, eclipse can compile/run/appear
> output...
>
> Are you sure? where can found this jdk min info? I think is 1.3 jdk
> the min...
You need to uncheck 'Use default compliance' on the compiler page and on
the 'Installed JREs' you can install your 1.2 (or whatever) JRE. Note
though that for starting the latest Eclipse IDE you will need JRE 1.6 or
higher.

Dani

Re: download to have support at least for old ver. 1.2 java version JDK [message #898677 is a reply to message #898673]

Fri, 27 July 2012 03:25

Eclipse User

anyway what eclipse ide the min, run by default(without additions) 1.2 jdk/jre and up? to this can installed jdk/jre 7?

[Updated on: Fri, 27 July 2012 03:25] by Moderator

Re: download to have support at least for old ver. 1.2 java version JDK [message #898695 is a reply to message #898677]

Fri, 27 July 2012 04:54

Eclipse User

Leonidas,

It looks to me that the latest Eclipse, which itself needs 1.6 to run,
allows you to install any JRE via Window->Preferences->Java->Installed
JREs. I suppose you'll want to make that 1.2 JRE your default. In the
Window->Preferences->Java->Compiler you can uncheck "Use default
compliance settings and pick 1.2 for "Generated .class files
compatibility" and "1.3" for "Source compatibility"; I suppose there
were source language changes between 1.2 and 1.3. That should do the
trick I think. Don't confuse the JRE the IDE needs to install, with the
JRE you want to target when developing Java code in that IDE.

On 27/07/2012 9:25 AM, Leonidas Savvides wrote:
> anyway what eclipse ide the min, run by default 1.2 jdk/jre and up? to
> this can installed jdk/jre 7?

Re: download to have support at least for old ver. 1.2 java version JDK [message #898733 is a reply to message #898695]

Fri, 27 July 2012 07:40

Eclipse User

jdk do compilation and jre run the Java App?
Where look for supported jdk/jre by ide<> also to choose what constantly run? if install 1.2 (run when choose only default 1.6) it will seem?

[Updated on: Fri, 27 July 2012 07:40] by Moderator

Re: download to have support at least for old ver. 1.2 java version JDK [message #898748 is a reply to message #898733]

Fri, 27 July 2012 08:38

Eclipse User

Leonidas,

Comments below.

On 27/07/2012 1:40 PM, Leonidas Savvides wrote:
> jdk do compilation
JDT has its own built-in incremental compiler. It does the compilation
and uses the preferences I pointed out.
> and jre run the Java App?
The JRE used to run the application depends on the JRE you have
configured/installed for use the the IDE, again using the preference I
pointed out.
> Where look for supported jdk/jre?
All are supported.
> if install 1.2 (run when choose only default 1.6) it will seem?
I can't make sense of this question. Have you tried to follow any of
the instructions you've been given?

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