Eclipse Referenced Libraries disappear
Automating using Java Eclipse?
Problem: In Java projects in Eclipse sometimes the folder "Referenced Libraries" disappears from the "Project Explorer" view. All third party jars are shown directly in the root of the project folder
Solution 1: Bring up the "Package Explorer" view (instead of the "Project Explorer" view).
Solution 2: Click on the little "down arrow" icon in the top-right corner of the Package Explorer view. In the context menu that appears, one of the items on the menu is "Show 'Referenced Libraries' Node." Click on that menu item.