Module java.base
Package java.util

Class EventObject

java.lang.Object
java.util.EventObject
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
AppEvent, AWTEvent, BeanContextEvent, CaretEvent, ChangeEvent, ConnectionEvent, DragGestureEvent, DragSourceEvent, DropTargetEvent, FlavorEvent, HandshakeCompletedEvent, HyperlinkEvent, LineEvent, ListDataEvent, ListSelectionEvent, MenuEvent, NamingEvent, NamingExceptionEvent, NodeChangeEvent, Notification, PopupMenuEvent, PreferenceChangeEvent, PrintEvent, PropertyChangeEvent, RowSetEvent, RowSorterEvent, SSLSessionBindingEvent, StatementEvent, TableColumnModelEvent, TableModelEvent, TreeExpansionEvent, TreeModelEvent, TreeSelectionEvent, UndoableEditEvent, UnsolicitedNotificationEvent
public class EventObject
extends Object
implements Serializable

The root class from which all event state objects shall be derived.

All Events are constructed with a reference to the object, the "source", that is logically deemed to be the object upon which the Event in question initially occurred upon.

Since:
1.1
See Also:
Serialized Form

  • Field Details

    • source

      protected transient Object source
      The object on which the Event initially occurred.

  • Constructor Details

    • EventObject

      public EventObject​(Object source)
      Constructs a prototypical Event.
      Parameters:
      source - the object on which the Event initially occurred
      Throws:
      IllegalArgumentException - if source is null

  • Method Details

    • getSource

      public Object getSource()
      The object on which the Event initially occurred.
      Returns:
      the object on which the Event initially occurred

    • toString

      public String toString()
      Returns a String representation of this EventObject.
      Overrides:
      toString in class Object
      Returns:
      a String representation of this EventObject