Module java.desktop

Package javax.swing

Class FocusManager

java.lang.Object

java.awt.KeyboardFocusManager

java.awt.DefaultKeyboardFocusManager

javax.swing.FocusManager

所有已实现的接口:

KeyEventDispatcher, KeyEventPostProcessor

直接已知的子类:

DefaultFocusManager

       public abstract class FocusManager extends DefaultKeyboardFocusManager
      

该类已被1.4焦点API所废弃。虽然客户端代码仍可使用该类，但强烈建议开发人员改用java.awt.KeyboardFocusManager和java.awt.DefaultKeyboardFocusManager。

请参阅如何使用焦点子系统，这是Java教程中的一个部分，以及焦点规范获取更多信息。

自版本:

1.2

另请参见:

• 焦点规范

Field Summary

Fields

Modifier and Type	Field	Description
static final String	FOCUS_MANAGER_CLASS_PROPERTY	该字段已过时，不建议使用，因为其规范与1.4焦点API不兼容。

Fields declared in class java.awt.KeyboardFocusManager

BACKWARD_TRAVERSAL_KEYS, DOWN_CYCLE_TRAVERSAL_KEYS, FORWARD_TRAVERSAL_KEYS, UP_CYCLE_TRAVERSAL_KEYS

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FocusManager()	子类调用的构造函数。

Method Summary

Modifier and Type	Method	Description
static void	disableSwingFocusManager()	已过时。 从1.4开始，由KeyboardFocusManager.setDefaultFocusTraversalPolicy(FocusTraversalPolicy)替代
static FocusManager	getCurrentManager()	返回调用线程上下文中当前的KeyboardFocusManager实例。
static boolean	isFocusManagerEnabled()	已过时。 从1.4开始，由KeyboardFocusManager.getDefaultFocusTraversalPolicy()替代
static void	setCurrentManager(FocusManager aFocusManager)	设置调用线程上下文中当前的KeyboardFocusManager实例。

Methods declared in class java.awt.DefaultKeyboardFocusManager

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

Methods declared in 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 declared in class java.lang.Object

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

Field Details

FOCUS_MANAGER_CLASS_PROPERTY

             public static final String FOCUS_MANAGER_CLASS_PROPERTY
            

该字段已过时，不建议使用，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。有关更多信息，请参阅焦点规范。

另请参见:

• KeyboardFocusManager.getCurrentKeyboardFocusManager()
• 焦点规范
• 常量字段值

Constructor Details

FocusManager

             protected FocusManager()
            

子类调用的构造函数。

Method Details

getCurrentManager

             public static FocusManager getCurrentManager()
            

返回调用线程上下文中当前的KeyboardFocusManager实例。

返回:

该线程上下文的KeyboardFocusManager

另请参见:

• setCurrentManager(javax.swing.FocusManager)

setCurrentManager

             public static void setCurrentManager(FocusManager aFocusManager) throws SecurityException
            

设置调用线程上下文中当前的KeyboardFocusManager实例。如果指定null，则当前的KeyboardFocusManager将被替换为DefaultKeyboardFocusManager的新实例。

如果安装了SecurityManager，则调用线程必须被授予AWTPermission "replaceKeyboardFocusManager"权限才能替换当前的KeyboardFocusManager。如果未授予此权限，此方法将抛出SecurityException，当前的KeyboardFocusManager将保持不变。

参数:

aFocusManager - 该线程上下文的新KeyboardFocusManager

抛出:

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()
            

Deprecated.

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

将当前KeyboardFocusManager的默认FocusTraversalPolicy更改为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()

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

返回:

如果焦点管理器已启用，则返回true。

另请参见:

• disableSwingFocusManager()