If you clarify whether you meant (code library) or installing an IDE plugin (update center), I can provide even more targeted steps, including screenshots or a specific library walkthrough.
(Optional) Select the node to link the Javadoc files, which provides tooltips and context-sensitive help while coding. Click OK to save the global library. Method 2: Adding Libraries Directly to a Project how to import library into jdeveloper upd
Before closing the dialog, check the column next to your newly added library or JAR file. If you clarify whether you meant (code library)