Re: java.lang.UnsupportedClassVersionError: Bad version number in.class file
Re: java.lang.UnsupportedClassVersionError: Bad version number in.class file
- Subject: Re: java.lang.UnsupportedClassVersionError: Bad version number in.class file
- From: Johann Werner <email@hidden>
- Date: Mon, 14 Jun 2010 17:51:44 +0200
When I struggled with those Java version problems I modified the build.xml file adding two attributes to the wocompile tag:
<wocompile source="1.5" target="1.5" ...>
giving the ant task the explicit Java version and had no problem since then.
jw
Am 14.06.2010 um 16:38 schrieb Chuck Hill:
> Also try just deleting the errors in the Problem view, then clean and build. Sometimes these errors seem to get "stuck" in Eclipse after you have fixed the problem.
>
> Chuck
>
> On Jun 14, 2010, at 6:55 AM, Kantala, Dmytro R. wrote:
>
>>
>> Were you able to resolve by switching compiler version?
>>
>> I am running into the same problem. I have eclipse configured to compile for 1.5.
>>
>> Build machine
>> Snow Leopard: 10.6.0
>> Eclipse: 3.4.2
>> Wolips: 3.4.5830
>> WO: 5.4.3
>>
>> Server
>> Leopard: 10.5.8
>> WO: 5.4.3
>>
>> Thanks,
>> DK
>>
>> -----Original Message-----
>> From: webobjects-dev-bounces+dkantala=email@hidden on behalf of Jake Bearkley
>> Sent: Mon 6/14/2010 9:01 AM
>> To: Farrukh Ijaz
>> Cc: email@hidden
>> Subject: Re: java.lang.UnsupportedClassVersionError: Bad version number in.class file
>>
>> Sorry,
>>
>> user error, I was trying to start the wrong application!! doh!
>>
>> I have been working on this too long and need sleep!
>>
>> thanks for your patience
>>
>> Bearko
>>
>> On Mon, Jun 14, 2010 at 10:05 PM, Jake Bearkley <email@hidden> wrote:
>>
>> > Thanks, but as I have said, I have changed the preference and I still get
>> > the error.
>> >
>> > What else can I do to eliminate the error?
>> >
>> > I use no java 1.6 code. The application is currently being developed on a
>> > Leopard environment with java 1.5 and I am trying to set up a new
>> > development machine.
>> >
>> > Thanks in Advance
>> > Bearko
>> >
>> >
>> > On Mon, Jun 14, 2010 at 9:43 PM, Farrukh Ijaz <
>> > email@hidden> wrote:
>> >
>> >> Thats fine! JDK 1.6 compiler can generate code compatible to JDK 1.5. The
>> >> message is for the target system. I've the same scenario where I have
>> >> applications in production running on PPC platform 1.5 but I've on my
>> >> Macbook 1.6.
>> >>
>> >> However you may find error if you're having code of 1.6 which is not
>> >> compatible to 1.5. In that case you need to change it with 1.5 compatible
>> >> code. But chances are very rare you get an error.
>> >>
>> >> Farrukh
>> >>
>> >> On 2010-06-14, at 3:01 PM, Jake Bearkley wrote:
>> >>
>> >> Hi All,
>> >>
>> >> I have done that :) but I still get the error
>> >>
>> >> when I select 1.5 as the compiler compliance level, a message appears at
>> >> the bottom
>> >> "When selecting 1.5 compliance, make sure to have a compatible JRE
>> >> installed and activated (currently 1.6)"
>> >>
>> >> but I can not install and activate 1.5 JRE because the directory is dimmed
>> >> when I try and add the JRE!!!
>> >>
>> >>
>> >> Cheers
>> >> Bearko
>> >>
>> >>
>> >>
>> >> On Mon, Jun 14, 2010 at 9:24 PM, Farrukh Ijaz <
>> >> email@hidden> wrote:
>> >>
>> >>> Eclipse > Preferences > Java > Compiler
>> >>>
>> >>> Set it to Java 1.5 before compiling.
>> >>>
>> >>> You can do the similar setup per project.
>> >>>
>> >>> Farrukh
>> >>>
>> >>> On 2010-06-14, at 2:51 PM, Jake Bearkley wrote:
>> >>>
>> >>> > HI All,
>> >>> >
>> >>> > I am trying to build an application on Snow Leopard with Java 1.6 and
>> >>> run on a Leopard server with Java 1.5
>> >>> >
>> >>> > Can someone give me guidance on how to do this.
>> >>> >
>> >>> > Java 1.5 is a symbolic link to 1.6 on the file system
>> >>> >
>> >>> > Within eclipse I have attempted to set the Workspace settings to use
>> >>> 1.5, to do this I also need to set the System JRE.
>> >>> >
>> >>> > I am unable to install JRE for 1.5, when I try to install it, I am
>> >>> unable to select the 1.5 directory as it is dimmed.
>> >>> >
>> >>> > can anyone enlighten me?
>> >>> >
>> >>> > Thanks in advance
>> >>> > Bearko
>> >>> >
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>>
>>
>>
>>
>>
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> --
> Chuck Hill Senior Consultant / VP Development
>
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