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When using JDK 11, Eclipse 2019-03 and jaxb-api (version 2.4, latest available in maven repository), Java Editor in Eclipse highlights the line:

import javax.xml.XMLConstants;

as an error:

The package javax.xml is accessible from more than one module: unnamed, java.xml

But the code compiles and no errors are displayed in Problems tab. Removing jaxb-api dependency makes the error go away. jaxb-api in this project is on the classpath and contains the following packages:

javax.xml.bind;
javax.xml.bind.annotation;
javax.xml.bind.annotation.adapters;
javax.xml.bind.attachment;
javax.xml.bind.helpers;
javax.xml.bind.util;

Is it a bug in Eclipse or a problem in the dependency/project?

Enzomatric
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2 Answers2

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Yes, this is a bug of the Eclipse 2019-03 Java IDE (in jaxb-api javax.xml is a subpackage, which is allowed, but not a real package, which would not be allowed):

Eclipse Bug 546315 - [11] "The package […] is accessible from more than one module: , […]" error shown in Java editor by mistake

The bug has already been fixed. So either ignore it (since the code is compiled) or use a newer version like Eclipse 2019-06 (4.12).

nitind
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howlger
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This happens when you have added the external jars in the ModulePath.

Solution:

1) Remove the external jars from the node "Modulepath". 2) Select the node "Classpath" then add the external jars. 3) Review that all the jars are under the node "Classpath".

Thiwanka Wickramage
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