in java using vtd-xml throws java.lang.UnsupportedClassVersionError

Question

I have an ear app with two EJB and one WEB (war) projects all using compiler compliance 1.5. In my web project I created a utility Class file that takes a byte array of an xml file and returns some string values using the vtd-xml library v2.10 and I instantiate an object of this class in a servlet. At the call of the constructor of the object (that takes a byte array) I get the error:

java.lang.UnsupportedClassVersionError: Bad version number in .class file

When I remove all vtd-xml related objects from the class I do not get this error. Any advice would be appreciated.

Regards

score 3 · Answer 1 · answered May 05 '11 at 22:30

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It sounds like the vtd-xml jar file has classes in it that are 1.6

answered May 05 '11 at 22:30

Kal

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score 2 · Answer 2 · answered May 05 '11 at 22:18

The documentation says:

Thrown when the Java Virtual Machine attempts to read a class file and determines that the major and minor version numbers in the file are not supported.

The library you are using must have been compiled with a different version of Java.

vtd-xml-author · Accepted Answer · 2011-05-06T08:54:13.370

2

you can recompile using the build.bat file (included with vtd-xml.zip) to obtain a new vtd-xml.jar.

edited May 06 '11 at 08:54

answered May 05 '11 at 22:45

vtd-xml-author

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score 2 · Answer 4 · answered Jul 05 '11 at 15:03

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Now it works executing build.bat file (included with vtd-xml.zip) but you need to edit the target version to 1.5 instead of 1.6

answered Jul 05 '11 at 15:03

Alvarock

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in java using vtd-xml throws java.lang.UnsupportedClassVersionError

4 Answers4