ComboPopup (Java Platform SE 8 )
Keywords: javax.swing.plaf.basic.ComboPopup interface
Date: 2026-01-21

javax.swing.plaf.basic

## Interface ComboPopup

- All Known Implementing Classes:
    BasicComboPopup, MetalComboBoxUI.MetalComboPopup

      public interface ComboPopup

  The interface which defines the methods required for the implementation of the popup portion of a combo box.

  Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the `java.beans` package. Please see `XMLEncoder`.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `KeyListener` | `getKeyListener()` Returns a key listener that will be added to the combo box or null.
    `JList` | `getList()` Returns the list that is being used to draw the items in the combo box.
    `MouseListener` | `getMouseListener()` Returns a mouse listener that will be added to the combo box or null.
    `MouseMotionListener` | `getMouseMotionListener()` Returns a mouse motion listener that will be added to the combo box or null.
    `void` | `hide()` Hides the popup
    `boolean` | `isVisible()` Returns true if the popup is visible (currently being displayed).
    `void` | `show()` Shows the popup
    `void` | `uninstallingUI()` Called to inform the ComboPopup that the UI is uninstalling.

- - ### Method Detail

    - #### show

          void show()

      Shows the popup

    - #### hide

          void hide()

      Hides the popup

    - #### isVisible

          boolean isVisible()

      Returns true if the popup is visible (currently being displayed).
      Returns:
        `true` if the component is visible; `false` otherwise.

    - #### getList

          JList getList()

      Returns the list that is being used to draw the items in the combo box. This method is highly implementation specific and should not be used for general list manipulation.

    - #### getMouseListener

          MouseListener getMouseListener()

      Returns a mouse listener that will be added to the combo box or null. If this method returns null then it will not be added to the combo box.
      Returns:
        a `MouseListener` or null

    - #### getMouseMotionListener

          MouseMotionListener getMouseMotionListener()

      Returns a mouse motion listener that will be added to the combo box or null. If this method returns null then it will not be added to the combo box.
      Returns:
        a `MouseMotionListener` or null

    - #### getKeyListener

          KeyListener getKeyListener()

      Returns a key listener that will be added to the combo box or null. If this method returns null then it will not be added to the combo box.

    - #### uninstallingUI

          void uninstallingUI()

      Called to inform the ComboPopup that the UI is uninstalling. If the ComboPopup added any listeners in the component, it should remove them here.

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