程序包 java.util.prefs

类 PreferenceChangeEvent

java.lang.Object

java.util.EventObject

java.util.prefs.PreferenceChangeEvent

所有已实现的接口:

Serializable

public class PreferenceChangeEvent
extends EventObject

An event emitted by a Preferences node to indicate that a preference has been added, removed or has had its value changed.

Note, that although PreferenceChangeEvent inherits Serializable interface from EventObject, it is not intended to be Serializable. Appropriate serialization methods are implemented to throw NotSerializableException.

从以下版本开始:

1.4

另请参阅:

Preferences, PreferenceChangeListener, NodeChangeEvent

字段概要

从类继承的字段 java.util.EventObject

source

构造器概要

构造器

构造器	说明
PreferenceChangeEvent(Preferences node, String key, String newValue)	Constructs a new PreferenceChangeEvent instance.

方法概要

限定符和类型	方法	说明
String	getKey()	Returns the key of the preference that was changed.
String	getNewValue()	Returns the new value for the preference.
Preferences	getNode()	Returns the preference node that emitted the event.

从类继承的方法 java.util.EventObject

getSource, toString

从类继承的方法 java.lang.Object

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

构造器详细资料

PreferenceChangeEvent

public PreferenceChangeEvent(Preferences node,
                             String key,
                             String newValue)

Constructs a new PreferenceChangeEvent instance.

参数:

node - The Preferences node that emitted the event.

key - The key of the preference that was changed.

newValue - The new value of the preference, or null if the preference is being removed.

方法详细资料

getNode

public Preferences getNode()

Returns the preference node that emitted the event.

返回:

The preference node that emitted the event.

getKey

public String getKey()

Returns the key of the preference that was changed.

返回:

The key of the preference that was changed.

getNewValue

public String getNewValue()

Returns the new value for the preference.

返回:

The new value for the preference, or null if the preference was removed.