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/25ab65da-b3a5-4458-955c-248dc64d97adn%40googlegroups.com.
