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In the spirit of requiring fewer actions on the part of the user to begin being productive, the Projects tab should start with the root node for each displayed project being opened when NetBeans starts. That is, instead of the Projects tab looking like: + MyProject1 + MyProject2 It would look like: - MyProject1 + Source Packages + Test Packages + Libraries + Test Libraries - MyProject2 + Source Packages + Test Packages + Libraries + Test Libraries This should be provided as a user-selectable option. It could also be set up so that all projects get expanded or that only the project designated as the "main" project would get expanded. It might also be helpful to expand at least the "Source Packages" nodes, though this could potentially lead to an excessive amount of clutter with multiple projects, each with multiple packages. This could be another user-selectable option (expand all project source nodes, expand only the main project source nodes, include/exclude test source nodes or library nodes).
Probably WONTFIX. The Projects tab used to simply persist its state across sessions (so you can leave open whatever you are working on actively) but this feature is disabled for now (for performance reasons).
(See issue #55701.)
If you want to keep expansion, please use next switch on your command line or write to the netbeans.conf file : -J-Dnetbeans.keep.expansion=true We've turned off this feature by default, because it takes long time to startup with a lot off expanded folders and looks ugly (see issue 55701) *** This issue has been marked as a duplicate of 55701 ***