In Netbeans, to the top left of where the code is, there used to be two panels, one called \'Projects\' where you could click a project name to open a tree of all the directorie
In NetBeans 8.2 Go to Window->Navigator in menu bar or press Ctrl+7 and select Projects it will open a folder as work space .
just go to Window in menu bar and select Projects
Window -> Projects
In Netbeans 6.8 on Windows, going to Window
-> Projects
brings it back for me. CTRL + 1 works as the shortcut.
Click Window > Reset Windows will give you back the old state of all windows!