I can't comment on the Eclipse plugin side of things, because we don't use those. But I can confirm that basic GWT 2.9/2.10 compilation works fine under Java 11 - that's our main Java platform now. I do recall some migration notes in the GWT 2.9 or 2.10 release notes we had to take care over, but I don't think those were Java version specific. More a case of changes in GWT packaging.
On Tuesday, 11 July 2023 at 23:47:37 UTC+1 Ying Jin wrote: > Ralph, thanks very much for your suggestion. I'll look into more of the > approach to convert our gwt project to maven project. > > BTW, I've found the solution to make the GWT plugin work again in my > laptop to compile the GWT project. > > I came across the following post when searching for the error related to > webappcreator. > > After I removed the "classpath" system variable from my new laptop and > moved the GWT SDK to the top of the build path, the GWT Compiler starts > working to compile the GWT project. > > > https://topic.alibabacloud.com/a/exception-invocation-of-font-colorredcomfont-font-colorredgooglefont-gwt-user-font-colorredtoolsfont-webappcreator-failed-see-the-error-log-for-more-details_8_8_31771273.html > > Cheers , > Jenny > > > On Tuesday, July 11, 2023 at 12:45:24 PM UTC-5 Ralph Fiergolla wrote: > >> >> It should not be that hard actually: you probably have separated client, >> shared and server side classes following the standard package naming >> convention. That is, basically it will be sufficient to copy your source >> code to the according client/shared/server sub projects and you are done. >> Okay, devil is in the details, but I did the same with some legacy project >> and happily live ever after. Give it a try. Definitely better than spending >> more time on installing different eclipse versions and plug-ins. >> Cheers >> Ralph >> On Tuesday, July 11, 2023 at 6:51:11 PM UTC+2 Ying Jin wrote: >> >>> Ralph, >>> >>> Thanks for your suggestion. However, one of our GWT project in >>> production was developed long time ago and has very big codebase. I'm not >>> sure how hard to convert it to Maven oriented project. It seems that we >>> have to do lots of code refactoring >>> in order to separate client side and server side code and other >>> configuraitons. >>> >>> thanks, >>> Jenny >>> >>> On Monday, July 10, 2023 at 11:59:01 PM UTC-5 Ralph Fiergolla wrote: >>> >>>> Hi Jenny! >>>> With all these issues related to out-dated Eclipse plug-ins I would >>>> strongly suggest switching to the new GWT Maven plug-in instead. Follow >>>> the >>>> instructions https://github.com/tbroyer/gwt-maven-archetypes/ to >>>> create a project that you can easily import into the most recent Eclipse >>>> (or any other IDE) subsequently. I don’t see much support for Eclipse >>>> plug-ins coming… I learned it the hard way too but am now happily working >>>> the Maven way. >>>> Bon courage! >>>> Ralph >>>> On Monday, July 10, 2023 at 7:25:41 PM UTC+2 Ying Jin wrote: >>>> >>>>> Hi Colin, >>>>> >>>>> I posted this issue on the gwt plugin site below, but there is no >>>>> reply yet. >>>>> >>>>> https://github.com/gwt-plugins/gwt-eclipse-plugin/issues/470 >>>>> >>>>> In addition, I've tried to install other version of Eclipse such as >>>>> Eclipse 4.18 (2020-12) with a new workspace. After I installed GWT plugin >>>>> 3 >>>>> from market place and tried to create a sample gwt web application >>>>> project >>>>> as described below in gwt site, I got the error " Invocation of >>>>> com.google.gwt.user.tools.WebAppCreator failed. See the error log for >>>>> more >>>>> details." It seems to me this current market place gwt plugin didn't >>>>> work >>>>> as I didn't use our project at all >>>>> and followed the tutorial below. >>>>> >>>>> https://www.gwtproject.org/usingeclipse.html >>>>> >>>>> Is there a way to get a working GWT plugin for Eclipse which can work >>>>> with JDK 11? >>>>> >>>>> Your help is much appreciated! >>>>> Jenny >>>>> On Tuesday, July 4, 2023 at 12:43:05 PM UTC-5 Colin Alworth wrote: >>>>> >>>>>> If the class can't be found, something is wrong with your gwt-dev, or >>>>>> the gwt-dev isn't on the classpath, or more details from the error >>>>>> message >>>>>> will indicate why the Compiler class couldn't be loaded. >>>>>> >>>>>> Please file a bug with more details (logs, full error message, other >>>>>> details about differences between the working computer and non-working >>>>>> computer) at https://github.com/gwt-plugins/gwt-eclipse-plugin/ so >>>>>> contributors there can take a closer look? >>>>>> >>>>>> On Sunday, July 2, 2023 at 2:28:44 PM UTC-5 [email protected] wrote: >>>>>> >>>>>>> I tried to reinstall Eclipse again and GWT 3 plugin again from >>>>>>> Eclipse market, downloaded and reinstalled gwt 2.9 for the project, >>>>>>> however, I still encountered the error below. >>>>>>> It is so weird, the project configuration in eclipse works in my old >>>>>>> laptop, not in the new one though it both has windows 10 installed. >>>>>>> >>>>>>> Error: Could not find or load main class com.google.gwt.dev.Compiler >>>>>>> >>>>>>> eclipse-jee-2020-06-R-win32-x86_64 >>>>>>> GWT Plugin 3.0 >>>>>>> gwt-2.9.0 >>>>>>> >>>>>>> Please see attached for the java build path dialog in eclipse. >>>>>>> >>>>>>> Any idea about resolving this error? Please help shed some light on >>>>>>> this problem. >>>>>>> >>>>>>> Your help is much appreciated! >>>>>>> Jenny >>>>>>> >>>>>>> >>>>>>> On Friday, June 16, 2023 at 3:25:42 PM UTC-5 Ying Jin wrote: >>>>>>> >>>>>>>> Thanks for your reply. Please see attached for the GWT lib >>>>>>>> specified in the java build path in Eclipse. I tried to compile it >>>>>>>> with JDK >>>>>>>> 8 and it didn't work either. >>>>>>>> The same project configuration in Eclipse worked in my old laptop, >>>>>>>> but not in my new laptop. The Eclipse in the new laptop is a copy of >>>>>>>> the >>>>>>>> Eclipse installed in the old laptop. >>>>>>>> >>>>>>>> In addition, I also tried to copy the "gwt-dev.jar" from the old >>>>>>>> laptop to the new one, but the compilation still gave me the following >>>>>>>> error. >>>>>>>> >>>>>>>> Error: Could not find or load main class com.google.gwt.dev.Compiler >>>>>>>> >>>>>>>> The project was compiled by using GWT->Compile option provided by >>>>>>>> the GWT Plugin installed in Eclipse. >>>>>>>> >>>>>>>> Version: 2020-06 (4.16.0) >>>>>>>> GWT Plugin version: 3.0 >>>>>>>> >>>>>>>> Your help is greatly appreciated! >>>>>>>> >>>>>>>> thanks, >>>>>>>> Jenny >>>>>>>> On Friday, June 16, 2023 at 12:33:18 PM UTC-5 Colin Alworth wrote: >>>>>>>> >>>>>>>>> GWT 2.9 should support running on Java 11, both running on JDK 11 >>>>>>>>> and compiling Java 11 sources. >>>>>>>>> >>>>>>>>> Without other information, it sounds like there is a problem with >>>>>>>>> your copy of gwt-dev.jar - the jar might be corrupt, or somehow not >>>>>>>>> on your >>>>>>>>> classpath? >>>>>>>>> >>>>>>>>> Can you verify that the jar is present and correct, and share more >>>>>>>>> specifics of how you are building? >>>>>>>>> >>>>>>>>> On Thursday, June 15, 2023 at 6:00:43 PM UTC-5 [email protected] >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> Hello, >>>>>>>>>> >>>>>>>>>> I tried to compile our GWT 2.9 project with JDK 11, but >>>>>>>>>> encountered the following error: >>>>>>>>>> >>>>>>>>>> Error: Could not find or load main class >>>>>>>>>> com.google.gwt.dev.Compiler >>>>>>>>>> >>>>>>>>>> Caused by: java.lang.ClassNotFoundException: >>>>>>>>>> com.google.gwt.dev.Compiler >>>>>>>>>> >>>>>>>>>> BTW, the Eclipse version is Version: 2020-06 (4.16.0). >>>>>>>>>> >>>>>>>>>> Please help shed some lights on this issue. >>>>>>>>>> >>>>>>>>>> thanks, >>>>>>>>>> Jenny >>>>>>>>>> >>>>>>>>> -- You received this message because you are subscribed to the Google Groups "GWT Users" group. 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