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. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/google-web-toolkit/ee51079f-aec1-4473-924e-6927556c31bdn%40googlegroups.com.
