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A Jar file is a compressed archive containing a set of files, ressources and directories. If its manifest file contains an attribute named ''Main-Class'', the attribute value (a canonical class name without the leading .class extension) will be launched at startup. Then it will be considered as executable archive.
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As you saw on the previous section running the demo application with the _java -jar_ command, we didn't specify the classpath entries at all. If you wonder why it is working, just have a look to the manifest of this jar archive. You can specify classpath entries in this file, here it is the manifest of the demo archive:
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First, do not include the module in your classpath, when you are dealing with jfreereport-module-''<modulename>''-''<version>''.jar module libraries it is easy. If you do not remember what are these *.jar libraries, go back to Bundled distribution section for more explanations.
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