ListModel (Java SE 12 & JDK 12 )
Keywords: javax.swing.ListModel interface

Module java.desktop
Package javax.swing

## Interface ListModel<E>

- Type Parameters:
    `E` - the type of the elements of this model
  All Known Subinterfaces:
    `ComboBoxModel<E>`, `MutableComboBoxModel<E>`
  All Known Implementing Classes:
    `AbstractListModel`, `BasicDirectoryModel`, `DefaultComboBoxModel`, `DefaultListModel`, `MetalFileChooserUI.DirectoryComboBoxModel`, `MetalFileChooserUI.FilterComboBoxModel`

      public interface ListModel<E>

  This interface defines the methods components like JList use to get the value of each cell in a list and the length of the list. Logically the model is a vector, indices vary from 0 to ListDataModel.getSize() - 1. Any change to the contents or length of the data model must be reported to all of the ListDataListeners.
  Since:
    1.2
  See Also:
    `JList`

- - ### Method Summary

    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `addListDataListener​(ListDataListener l)` | Adds a listener to the list that's notified each time a change to the data model occurs.
    `E` | `getElementAt​(int index)` | Returns the value at the specified index.
    `int` | `getSize()` | Returns the length of the list.
    `void` | `removeListDataListener​(ListDataListener l)` | Removes a listener from the list that's notified each time a change to the data model occurs.

- - ### Method Detail

    - #### getSize

          int getSize()

      Returns the length of the list.
      Returns:
        the length of the list

    - #### getElementAt

          E getElementAt​(int index)

      Returns the value at the specified index.
      Parameters:
        `index` - the requested index
      Returns:
        the value at `index`

    - #### addListDataListener

          void addListDataListener​(ListDataListener l)

      Adds a listener to the list that's notified each time a change to the data model occurs.
      Parameters:
        `l` - the `ListDataListener` to be added

    - #### removeListDataListener

          void removeListDataListener​(ListDataListener l)

      Removes a listener from the list that's notified each time a change to the data model occurs.
      Parameters:
        `l` - the `ListDataListener` to be removed