EventObject (Java SE 9 & JDK 9 )

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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 , Event , 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 Summary

Fields
Modifier and Type Field Description

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

Constructor Summary

Constructors
Constructor Description

EventObject (Object source)
Constructs a prototypical Event.

Method Summary

All Methods
Modifier and Type	Method	Description
`Object`	`getSource ()`	The object on which the Event initially occurred.
`String`	`toString ()`	Returns a String representation of this EventObject.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - source
```
protected transient Object source
```
    The object on which the Event initially occurred.
- Constructor Detail
  - 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 Detail
  - 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 a String representation of this EventObject.

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