GWT中的“Development mode is loading...”和“waiting for launch URL”

Question

我是GWT的初学者，正在尝试运行一个来自http://www.vogella.com/tutorials/GWT/article.html的示例HelloWorld程序。我安装了Eclipse Kepler 4.3的GWT插件，并下载了GWT SDK 2.3。在eclipse中配置SDK时，我发现“gwt-codeserver.jar is missing”的错误，所以我下载了“gwt-codserver-2.5”jar并将其复制到SDK文件夹中，修复了丢失jar的问题。

    Unknown Argument: -superDevMode
    DevMode [-[no]startServer] [-port port-number | "auto"] [-whitelist whitelist-string] [-blacklist blacklist-string] [-logdir directory] [-logLevel level] [-gen dir] [-bindAddress host-name-or-address] [-codeServerPort port-number | "auto"] [-server servletContainerLauncher[:args]] [-startupUrl url] [-war dir] [-deploy dir] [-extra dir] [-workDir dir] [-sourceLevel [auto, 1.6, 1.7]] module[s] 

    where 
      -[no]startServer  Starts a servlet container serving the directory specified by the -war flag. (defaults to ON)
      -port             Specifies the TCP port for the embedded web server (defaults to 8888)
      -whitelist        Allows the user to browse URLs that match the specified regexes (comma or space separated)
      -blacklist        Prevents the user browsing URLs that match the specified regexes (comma or space separated)
      -logdir           Logs to a file in the given directory, as well as graphically
      -logLevel         The level of logging detail: ERROR, WARN, INFO, TRACE, DEBUG, SPAM, or ALL
      -gen              Debugging: causes normally-transient generated types to be saved in the specified directory
      -bindAddress      Specifies the bind address for the code server and web server (defaults to 127.0.0.1)
      -codeServerPort   Specifies the TCP port for the code server (defaults to 9997)
      -server           Specify a different embedded web server to run (must implement ServletContainerLauncher)
      -startupUrl       Automatically launches the specified URL
      -war              The directory into which deployable output files will be written (defaults to 'war')
      -deploy           The directory into which deployable but not servable output files will be written (defaults to 'WEB-INF/deploy' under the -war directory/jar, and may be the same as the -extra directory/jar)
      -extra            The directory into which extra files, not intended for deployment, will be written
      -workDir          The compiler's working directory for internal use (must be writeable; defaults to a system temp dir)
      -sourceLevel      Specifies Java source level (defaults to auto:1.7)
    and 
      module[s]         Specifies the name(s) of the module(s) to host

Answer 1

这两个错误（缺少gwt-codeserver和未知参数）都暗示Google Eclipse插件没有正确检测到您正在使用的GWT SDK的版本。

GWT2.3现在已经很老了，所以我建议尝试使用GWT2.7。由于您是从GWT开始的，所以从SuperDevMode开始也比花几天时间让DevMode与最近的浏览器一起工作要好。注意：这意味着您将从浏览器中调试，而不是从IDE中调试（除非您从https://SDBG.github.io安装SDBG插件）