# Class BasicOptionPaneUI.ButtonActionListener

java.lang.Object
javax.swing.plaf.basic.BasicOptionPaneUI.ButtonActionListener

All Implemented Interfaces:
  `ActionListener, EventListener`

Enclosing class:
  `BasicOptionPaneUI`

public class BasicOptionPaneUI.ButtonActionListener extends Object implements ActionListener
This class should be treated as a "protected" inner class. Instantiate it only within subclasses of `BasicOptionPaneUI`.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected int`
  `buttonIndex`
  The index of the button.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `ButtonActionListener(int buttonIndex)`
  Constructs a new instance of `ButtonActionListener`.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `actionPerformed(ActionEvent e)`
  Invoked when an action occurs.

  ### Methods declared in class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Field Details

  - ### buttonIndex

    protected int buttonIndex
    The index of the button.

- ## Constructor Details

  - ### ButtonActionListener

    public ButtonActionListener(int buttonIndex)
    Constructs a new instance of `ButtonActionListener`.
    Parameters:
      `buttonIndex` - an index of the button

- ## Method Details

  - ### actionPerformed

    public void actionPerformed(ActionEvent e)
    Description copied from interface: `ActionListener`
    Invoked when an action occurs.
    Specified by:
      `actionPerformed` in interface `ActionListener`
    Parameters:
      `e` - the event to be processed