模块 java.desktop

软件包 javax.swing

Class FocusManager

java.lang.Object

java.awt.KeyboardFocusManager

java.awt.DefaultKeyboardFocusManager

javax.swing.FocusManager

实现的所有接口

KeyEventDispatcher ， KeyEventPostProcessor

已知直接子类：

DefaultFocusManager

public abstract class FocusManager
extends DefaultKeyboardFocusManager

这个类已经被1.4焦点API淘汰了。 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 ，在Java教程一节，并Focus Specification获取更多信息。

从以下版本开始：

1.2

另请参见：

Focus Specification

字段汇总

字段

变量和类型	字段	描述
static String	FOCUS_MANAGER_CLASS_PROPERTY	该字段已过时，不鼓励使用它，因为其规范与1.4焦点API不兼容。

声明的属性在类 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

构造器	描述
FocusManager()

方法摘要

变量和类型	方法	描述
static void	disableSwingFocusManager()	已过时。 截至1.4，由KeyboardFocusManager.setDefaultFocusTraversalPolicy(FocusTraversalPolicy)取代
static FocusManager	getCurrentManager()	返回调用线程上下文的当前 KeyboardFocusManager实例。
static boolean	isFocusManagerEnabled()	已过时。 截至1.4，由KeyboardFocusManager.getDefaultFocusTraversalPolicy()取代
static void	setCurrentManager(FocusManager aFocusManager)	为调用线程的上下文设置当前 KeyboardFocusManager实例。

声明方法的类 java.awt.DefaultKeyboardFocusManager

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

声明方法的类 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

声明方法的类 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，不鼓励使用它，因为其规范与1.4焦点API不兼容。 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，请参阅焦点规范。

另请参见：

KeyboardFocusManager.getCurrentKeyboardFocusManager() ， Focus Specification ， 常数字段值

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

这个帖子的上下文是 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SecurityManager ，则必须为调用线程授予AWTPermission “replaceKeyboardFocusManager”以替换当前的KeyboardFocusManager 。 如果未授予此权限，则此方法将抛出SecurityException ，并且当前KeyboardFocusManager将保持不变。

参数

aFocusManager - 此线程的上下文的新 KeyboardFocusManager

异常

SecurityException - 如果调用线程无权替换当前 KeyboardFocusManager

另请参见：

getCurrentManager() ， DefaultKeyboardFocusManager

disableSwingFocusManager

@Deprecated
public static void disableSwingFocusManager()

Deprecated.

as of 1.4, replaced by KeyboardFocusManager.setDefaultFocusTraversalPolicy(FocusTraversalPolicy)

将当前 KeyboardFocusManager的默认值 FocusTraversalPolicy为 DefaultFocusTraversalPolicy 。

另请参见：

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

isFocusManagerEnabled

@Deprecated
public static boolean isFocusManagerEnabled()

Deprecated.

As of 1.4, replaced by KeyboardFocusManager.getDefaultFocusTraversalPolicy()

返回应用程序是否已调用 disableSwingFocusManager() 。

结果

true如果启用了焦点管理器。

另请参见：

disableSwingFocusManager()