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HyperlinkEvent (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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javax.swing.event
Class HyperlinkEvent

java.lang.Object
  |
  +--java.util.EventObject
        |
        +--javax.swing.event.HyperlinkEvent

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

HTMLFrameHyperlinkEvent

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public class HyperlinkEvent

extends EventObject

HyperlinkEvent is used to notify interested parties that something has happened with respect to a hypertext link.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans^TM has been added to the java.beans package. Please see XMLEncoder.

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Nested Class Summary
static class	HyperlinkEvent.EventType           Defines the ENTERED, EXITED, and ACTIVATED event types, along with their string representations, returned by toString().

 

Field Summary

 

Fields inherited from class java.util.EventObject

source

 

Constructor Summary

HyperlinkEvent(Object source, HyperlinkEvent.EventType type, URL u)           Creates a new object representing a hypertext link event.

HyperlinkEvent(Object source, HyperlinkEvent.EventType type, URL u, String desc)           Creates a new object representing a hypertext link event.

HyperlinkEvent(Object source, HyperlinkEvent.EventType type, URL u, String desc, Element sourceElement)           Creates a new object representing a hypertext link event.

 

Method Summary
String	getDescription()           Get the description of the link as a string.
HyperlinkEvent.EventType	getEventType()           Gets the type of event.
Element	getSourceElement()           Returns the Element that corresponds to the source of the event.
URL	getURL()           Gets the URL that the link refers to.

 

Methods inherited from class java.util.EventObject

getSource, toString

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

HyperlinkEvent

public HyperlinkEvent(Object source,
                      HyperlinkEvent.EventType type,
                      URL u)

Creates a new object representing a hypertext link event. The other constructor is preferred, as it provides more information if a URL could not be formed. This constructor is primarily for backward compatibility.

Parameters:

source - the object responsible for the event

type - the event type

u - the affected URL

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HyperlinkEvent

public HyperlinkEvent(Object source,
                      HyperlinkEvent.EventType type,
                      URL u,
                      String desc)

Creates a new object representing a hypertext link event.

Parameters:

source - the object responsible for the event

type - the event type

u - the affected URL. This may be null if a valid URL could not be created.

desc - the description of the link. This may be useful when attempting to form a URL resulted in a MalformedURLException. The description provides the text used when attempting to form the URL.

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HyperlinkEvent

public HyperlinkEvent(Object source,
                      HyperlinkEvent.EventType type,
                      URL u,
                      String desc,
                      Element sourceElement)

Creates a new object representing a hypertext link event.

Parameters:

source - the object responsible for the event

type - the event type

u - the affected URL. This may be null if a valid URL could not be created.

desc - the description of the link. This may be useful when attempting to form a URL resulted in a MalformedURLException. The description provides the text used when attempting to form the URL.

sourceElement - Element in the Document representing the anchor

Since:

1.4

Method Detail

getEventType

public HyperlinkEvent.EventType getEventType()

Gets the type of event.

Returns:

the type

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getDescription

public String getDescription()

Get the description of the link as a string. This may be useful if a URL can't be formed from the description, in which case the associated URL would be null.

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getURL

public URL getURL()

Gets the URL that the link refers to.

Returns:

the URL

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getSourceElement

public Element getSourceElement()

Returns the Element that corresponds to the source of the event. This will typically be an Element representing an anchor. If a constructur that is used that does not specify a source Element, or null was specified as the source Element, this will return null.

Returns:

Element indicating source of event, or null

Since:

1.4

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.