Re: Building a GWT project in Eclipse 2019-03+ with Java 11.

On Saturday, February 19, 2022 at 1:57:16 AM UTC+1 tequil...@gmail.com wrote:

Hi Jasper

I'll be just glad if my current progress saves someone's time.

I progress on step by step basis, so far I succeeded in Eclipse build and debugging.

Most of my problems were caused by combination of JDK11+ (namely modules) + Gradle + Eclipse + Eclipse GWT Plugin. 

Reason: GWT SDK gwt-dev.jar contains lot of classes that must not be visible to Eclipse compiler, but in fact they are, causing dreaded "The package org.w3c.dom is accessible from more than one module: <unnamed>, java.xml" error.

When `gradle build` is issued in command line the gwt-dev.jar from the maven repository is linked, it contains exactly essential google classes and nothing more. Thus the build succeeds.

But when you import such project in Eclipse under JDK11+ (I use JDK17) and select a GWT SDK there're lots of build errors caused by "The package is accessible from more than one module"

Can't you somehow disable the module path or put all dependencies in the classpath rather than the module path?

https://help.eclipse.org/latest/index.jsp?topic=%2Forg.eclipse.jdt.doc.user%2Freference%2Fref-properties-build-path.htm&resultof%3D%2522%256a%2570%256d%2573%2522%2520%2522%256a%2570%256d%2522%2520 

Alternatively, how about not using the Eclipse GWT Plugin?

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