📅 最后修改于: 2020-11-10 04:47:42 🧑 作者: Mango
事件类表示事件。 Java提供了各种Event类，但是，仅讨论那些更常用的类。
它是从其派生所有事件状态对象的根类。所有事件的构造均以对对象source的引用为依据，该对象在逻辑上被视为最初发生有关事件的对象。此类在java.util包中定义。
以下是java.util.EventObject类的声明-
public class EventObject
extends Object
implements Serializable
以下是java.util.EventObject类的字段-
protected Object source-事件最初发生的对象。
| Sr.No. | Constructor & Description |
|---|---|
| 1 |
EventObject(Object source) Constructs a prototypical Event. |
| Sr.No. | Method & Description |
|---|---|
| 1 |
Object getSource() The object on which the Event initially occurred. |
| 2 |
String toString() Returns a String representation of this EventObject. |
此类从以下类继承方法-
以下是常用事件类的列表。
| Sr.No. | Class & Description |
|---|---|
| 1 | AWTEvent
It is the root event class for all SWING events. This class and its subclasses supercede the original java.awt.Event class. |
| 2 | ActionEvent
The ActionEvent is generated when the button is clicked or the item of a list is double-clicked. |
| 3 | InputEvent
The InputEvent class is the root event class for all component-level input events. |
| 4 | KeyEvent
On entering the character the Key event is generated. |
| 5 | MouseEvent
This event indicates a mouse action occurred in a component. |
| 6 | WindowEvent
The object of this class represents the change in the state of a window. |
| 7 | AdjustmentEvent
The object of this class represents the adjustment event emitted by Adjustable objects. |
| 8 | ComponentEvent
The object of this class represents the change in the state of a window. |
| 9 | ContainerEvent
The object of this class represents the change in the state of a window. |
| 10 | MouseMotionEvent
The object of this class represents the change in the state of a window. |
| 11 | PaintEvent
The object of this class represents the change in the state of a window. |