Why do I get an exception java.lang.NoClassDefFoundError: com/sun/tools/javadoc/Main?
This exception will occur when you execute UMLGraph directly as a jar (not throughjavadoc), and the files UmlGraph.jar and tools.jar are not in the same directory. Either copy UmlGraph.jar in the directory where the tools.jar of the JDK distribution is located (and execute UmlGraph.jar from there), or copy tools.jar to the directory where UmlGraph.jar is located.
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