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Similarly to what is done with the JDBC URL when creating a database connection, show the javadoc command/options as components are selected/completed. For example, if someone selects the author and version checkboxes and leaves everything else blank, there will be a component (with listener) that shows the following: javadoc -author -version ... Thanks. Note: This is relative to the the panel associated with the Build/Documenting node in the Project Properties dialog.