Module java.desktop

软件包 javax.swing

Class DefaultFocusManager

java.lang.Object

java.awt.KeyboardFocusManager

java.awt.DefaultKeyboardFocusManager

javax.swing.FocusManager

javax.swing.DefaultFocusManager

All Implemented Interfaces:

KeyEventDispatcher ， KeyEventPostProcessor

public class DefaultFocusManager
extends FocusManager

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，但是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，以及有关更多信息的Focus Specification 。

从以下版本开始：

1.2

Field Summary

Fields inherited from class javax.swing.FocusManager

FOCUS_MANAGER_CLASS_PROPERTY

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
DefaultFocusManager()	构造一个 DefaultFocusManager 。

方法摘要

Modifier and Type	方法	描述
boolean	compareTabOrder(Component a, Component b)	通过焦点遍历循环顺序对组件进行比较。
Component	getComponentAfter(Container aContainer, Component aComponent)	返回之后的组件。
Component	getComponentBefore(Container aContainer, Component aComponent)	返回之前的组件。
Component	getFirstComponent(Container aContainer)	返回第一个组件。
Component	getLastComponent(Container aContainer)	返回最后一个组件。

Methods inherited from class java.awt.DefaultKeyboardFocusManager

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

Methods inherited from class javax.swing.FocusManager

disableSwingFocusManager, getCurrentManager, isFocusManagerEnabled, setCurrentManager

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

构造方法详细信息

DefaultFocusManager

public DefaultFocusManager()

构造一个 DefaultFocusManager 。

方法详细信息

getComponentAfter

public Component getComponentAfter(Container aContainer,
                                   Component aComponent)

返回之后的组件。

参数

aContainer - 一个容器

aComponent - 一个组件

结果

组件之后

getComponentBefore

public Component getComponentBefore(Container aContainer,
                                    Component aComponent)

返回之前的组件。

参数

aContainer - 一个容器

aComponent - 一个组件

结果

组件之前

getFirstComponent

public Component getFirstComponent(Container aContainer)

返回第一个组件。

参数

aContainer - 一个容器

结果

第一个组件

getLastComponent

public Component getLastComponent(Container aContainer)

返回最后一个组件。

参数

aContainer - 一个容器

结果

最后一个组件

compareTabOrder

public boolean compareTabOrder(Component a,
                               Component b)

通过焦点遍历循环顺序对组件进行比较。

参数

a - 第一个组件

b - 第二个组件

结果

通过它们的焦点遍历循环顺序对组件进行比较