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Editorial Team
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Asked: 2026-06-06T18:36:52+00:00

I’m trying to run a jar, gwt-codeserver.jar , in OSX.7, with the command java

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I’m trying to run a jar, gwt-codeserver.jar, in OSX.7, with the command

java -cp ".:/sdk/gwt-2.5.0.rc1/gwt-dev.jar" -jar /sdk/gwt-2.5.0.rc1/gwt-codeserver.jar com.activegrade.TeacherView

The command fails with:

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/gwt/core/ext/TreeLogger
Caused by: java.lang.ClassNotFoundException: com.google.gwt.core.ext.TreeLogger
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    ...

But gwt-dev.jar contains the definition for com.google.gwt.core.ext.TreeLogger, so I’ve concluded that I’m not properly setting the classpath here.

Am I setting the classpath correctly? The jar file is definitely the right jar and it’s definitely at that location. How can I diagnose this further?

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1 Answer

  1. Editorial Team

    Could this be the source of your problem? “When you use the -jar option, the JAR file is the source of all user classes, and other user class path settings are ignored.”

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