The JList used for representing the files is created by subclasses, but the
selection is monitored in this class. The TransferHandler installed in the
JFileChooser is also installed in the file list as it is used as the actual
transfer source. The list is updated on a mouse enter to reflect the current
data transfer state of the file chooser.
Submit a bug or feature For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.