Module java.desktop

软件包 javax.swing

Class FocusManager

java.lang.Object

java.awt.KeyboardFocusManager

java.awt.DefaultKeyboardFocusManager

javax.swing.FocusManager

All Implemented Interfaces:

KeyEventDispatcher ， KeyEventPostProcessor

已知直接子类：

DefaultFocusManager

public abstract class FocusManager
extends DefaultKeyboardFocusManager

这个类已被1.4焦点API过时了。 虽然客户端代码仍然可以使用此类，但强烈建议开发人员使用java.awt.KeyboardFocusManager和java.awt.DefaultKeyboardFocusManager 。

请参阅How to Use the Focus Subsystem ， Java教程中的一节，以及Focus Specification了解更多信息。

从以下版本开始：

1.2

另请参见：

Focus Specification

Field Summary

Fields

Modifier and Type	Field	描述
static String	FOCUS_MANAGER_CLASS_PROPERTY	该字段已过时，因为其规范与1.4焦点API不兼容，因此不鼓励使用该字段。

Fields inherited from class java.awt.KeyboardFocusManager

BACKWARD_TRAVERSAL_KEYS, DOWN_CYCLE_TRAVERSAL_KEYS, FORWARD_TRAVERSAL_KEYS, UP_CYCLE_TRAVERSAL_KEYS

构造方法摘要

构造方法

Constructor	描述
FocusManager()

方法摘要

Modifier and Type	方法	描述
static void	disableSwingFocusManager()	已过时。 截至1.4，由KeyboardFocusManager.setDefaultFocusTraversalPolicy(FocusTraversalPolicy)替换
static FocusManager	getCurrentManager()	返回调用线程的上下文的当前 KeyboardFocusManager实例。
static boolean	isFocusManagerEnabled()	已过时。 截至1.4，由KeyboardFocusManager.getDefaultFocusTraversalPolicy()替代
static void	setCurrentManager(FocusManager aFocusManager)	为调用线程的上下文设置当前的 KeyboardFocusManager实例。

Methods inherited from class java.awt.DefaultKeyboardFocusManager

dequeueKeyEvents, discardKeyEvents, dispatchEvent, dispatchKeyEvent, downFocusCycle, enqueueKeyEvents, focusNextComponent, focusPreviousComponent, postProcessKeyEvent, processKeyEvent, upFocusCycle

Methods inherited from class java.awt.KeyboardFocusManager

addKeyEventDispatcher, addKeyEventPostProcessor, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, addVetoableChangeListener, clearFocusOwner, clearGlobalFocusOwner, downFocusCycle, firePropertyChange, fireVetoableChange, focusNextComponent, focusPreviousComponent, getActiveWindow, getCurrentFocusCycleRoot, getCurrentKeyboardFocusManager, getDefaultFocusTraversalKeys, getDefaultFocusTraversalPolicy, getFocusedWindow, getFocusOwner, getGlobalActiveWindow, getGlobalCurrentFocusCycleRoot, getGlobalFocusedWindow, getGlobalFocusOwner, getGlobalPermanentFocusOwner, getKeyEventDispatchers, getKeyEventPostProcessors, getPermanentFocusOwner, getPropertyChangeListeners, getPropertyChangeListeners, getVetoableChangeListeners, getVetoableChangeListeners, redispatchEvent, removeKeyEventDispatcher, removeKeyEventPostProcessor, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, removeVetoableChangeListener, setCurrentKeyboardFocusManager, setDefaultFocusTraversalKeys, setDefaultFocusTraversalPolicy, setGlobalActiveWindow, setGlobalCurrentFocusCycleRoot, setGlobalFocusedWindow, setGlobalFocusOwner, setGlobalPermanentFocusOwner, upFocusCycle

Methods inherited from class java.lang.Object

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

字段详细信息

FOCUS_MANAGER_CLASS_PROPERTY

public static final String FOCUS_MANAGER_CLASS_PROPERTY

该字段已过时，因为其规范与1.4焦点API不兼容，因此不鼓励使用该字段。 当前的FocusManager不再是UI的属性。 客户端代码必须使用KeyboardFocusManager.getCurrentKeyboardFocusManager()查询当前的FocusManager。 有关详细信息，请参阅焦点规格。

另请参见：

KeyboardFocusManager.getCurrentKeyboardFocusManager() ， Focus Specification ， Constant Field Values

构造方法详细信息

FocusManager

public FocusManager()

方法详细信息

getCurrentManager

public static FocusManager getCurrentManager()

返回调用线程上下文的当前 KeyboardFocusManager实例。

结果

这个线程的上下文的 KeyboardFocusManager

另请参见：

setCurrentManager(javax.swing.FocusManager)

setCurrentManager

public static void setCurrentManager(FocusManager aFocusManager)
                              throws SecurityException

为调用线程的上下文设置当前的KeyboardFocusManager实例。 如果null指定，那么当前KeyboardFocusManager被替换的新实例DefaultKeyboardFocusManager 。

如果安装了一个SecurityManager ，则调用线程必须被授予AWTPermission “replaceKeyboardFocusManager”，以替换当前的KeyboardFocusManager 。 如果不允许此权限，此方法将抛出一个SecurityException ，而当前的KeyboardFocusManager将保持不变。

参数

aFocusManager - 这个线程的上下文的新的 KeyboardFocusManager

异常

SecurityException - 如果调用线程没有权限替换当前的 KeyboardFocusManager

另请参见：

getCurrentManager() ， DefaultKeyboardFocusManager

disableSwingFocusManager

@Deprecated
public static void disableSwingFocusManager()

已过时。 截至1.4，由KeyboardFocusManager.setDefaultFocusTraversalPolicy(FocusTraversalPolicy)取代

将当前 KeyboardFocusManager的默认值更改为 FocusTraversalPolicy至 DefaultFocusTraversalPolicy 。

另请参见：

DefaultFocusTraversalPolicy ， KeyboardFocusManager.setDefaultFocusTraversalPolicy(java.awt.FocusTraversalPolicy)

isFocusManagerEnabled

@Deprecated
public static boolean isFocusManagerEnabled()

已过时。 截至1.4，由KeyboardFocusManager.getDefaultFocusTraversalPolicy()替代

返回应用程序是否调用了 disableSwingFocusManager() 。

结果

true如果启用了焦点管理器。

另请参见：

disableSwingFocusManager()