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[java] adding items to a JList

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I have an ArrayList of Building objects, which in turn has an ArrayList of Room objects. I have a editor form for adding Buildings to the list and Rooms to the buildings. I have a JList that I want to display the buildings in, but for the life of me I can''t figure out how to add items to the JList after it has been initialized.
capn_midnight | Captain Midnight | deviantArt ACM | SIGGRAPH | Generation5 "I''m tired of all this nonsense about beauty being only skin-deep. That''s deep enough. What do you want - an adorable pancreas?" -Jean Kerr

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