Package org.apache.commons.net.util

# Class ListenerList<T extends EventListener>

java.lang.Object
org.apache.commons.net.util.ListenerList<T>

Type Parameters:
  `T` - the type of elements returned by the iterator

All Implemented Interfaces:
  `Serializable`, `Iterable<T>`

public class ListenerList<T extends EventListener> extends Object implements Serializable, Iterable<T>
A list of event listeners.

See Also:
  - Serialized Form

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `ListenerList()`
  Constructs a new instance.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `addListener(T listener)`
  Adds the given listener to the end of this list.
  `int`
  `getListenerCount()`
  Gets the number of elements in this list.
  `boolean`
  `isEmpty()`
  Tests whether if this listener list is empty.
  `Iterator<T>`
  `iterator()`
  Return an `Iterator` for the `EventListener` instances.
  `void`
  `removeListener(T listener)`
  Removes the first occurrence of the specified listener from this list, if it is present.

  ### Methods inherited from class java.lang.Object

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

  ### Methods inherited from interface java.lang.Iterable

  `forEach, spliterator`

- ## Constructor Details

  - ### ListenerList

    public ListenerList()
    Constructs a new instance.

- ## Method Details

  - ### addListener

    public void addListener(T listener)
    Adds the given listener to the end of this list.
    Parameters:
      `listener` - A listener.

  - ### getListenerCount

    public int getListenerCount()
    Gets the number of elements in this list.
    Returns:
      the number of elements in this list

  - ### isEmpty

    public boolean isEmpty()
    Tests whether if this listener list is empty.
    Returns:
      whether if this listener list is empty.
    Since:
      3.12.0

  - ### iterator

    public Iterator<T> iterator()
    Return an `Iterator` for the `EventListener` instances.
    Specified by:
      `iterator` in interface `Iterable<T extends EventListener>`
    Returns:
      an `Iterator` for the `EventListener` instances
    Since:
      2.0 TODO Check that this is a good defensive strategy

  - ### removeListener

    public void removeListener(T listener)
    Removes the first occurrence of the specified listener from this list, if it is present.
    Parameters:
      `listener` - listener to be removed from this list, if present.