[antlr-interest] ANTLR3 ant task class file problem

[Terence Parr]

it has been rebuilt with java 5.
Ter
On May 17, 2007, at 5:43 PM, Travis Caldwell wrote:

>
>  Hi,
>
>  I noticed on the new ANTLR v3 web site that the ANTLR ANT task was
> updated on today (May 17), but the release notes look the same.
>
>  Has this Java 6 issue been fixed?
>
>                               -LS
>
> --- Travis Caldwell <travis_caldwell2000 at yahoo.com> wrote:
>
>>
>>  Hi,
>>
>>  I was attempting to use the ANTLR3 ant task that was uploaded to the
>> file sharing site and I get the following error:
>>
>>  BUILD FAILED
>> java.lang.UnsupportedClassVersionError: Bad version number in .class
>> file
>>
>>  Googling this list I see that someone previously had the same issue:
>>
>>> [antlr-interest] comments on ant task for v3..
>>> Eitan Suez eitan.suez at gmail.com
>>> Thu Feb 8 14:14:53 PST 2007
>> [...]
>>> 5. the ant task appears to be built with java 6.
>>>  i tried to run a test target and am getting this:
>>> BUILD FAILED
>>> java.lang.UnsupportedClassVersionError: Bad version number in
>> .class
>> file
>>
>>  It also looks like there was an attempt to solve this here:
>>
>>> [antlr-interest] updated antlr3 ANT task
>>> Terence Parr parrt at cs.usfca.edu
>>> Sat Feb 10 16:08:49 PST 2007
>> [...]
>>>       Compiled the antlr3 taks with -source 5 for compatibility
>> with Java 5.
>>
>>  I checked the zip that I downloaded and I definitely have the new
>> version since the readme in the zip also refers to being compiled
>> with
>> "-source 5". It also includes the simplecTreeParser example refered
>> to
>> in the email about the new version.
>>
>> The class file looks to like it was built for java 6:
>>
>> $ od -tx1 ANTLR3.class | head
>> 0000000 ca fe ba be 00 00 00 32 02 0d 0a 00 ae 01 05 07
>>                              ^^
>> The major number is 50 decimal which according to this:
>>
>>
>>
> http://help.eclipse.org/help32/index.jsp?topic=/ 
> org.eclipse.jdt.doc.isv/guide/jdt_api_compile.htm
>>
>> Indicates a Java 6 class file.
>>
>>  Perhaps the compile should be done with "-source 5 -target 5" in
>> order
>> to be compatible with both java 5 & 6.
>>
>>  I think that "-source 5" may only instruct the compiler to expcet
>> java
>> 5 source, but it will still emit java 6 class files.
>>
>>  Thanks.
>>
>>                   _Travis_Caldwell_
>>
>>
>>
>>
>>
>>
>>
>>
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