JavaTM Platform
Standard Ed. 6

javax.swing
类 JButton

java.lang.Object
  继承者 java.awt.Component
      继承者 java.awt.Container
          继承者 javax.swing.JComponent
              继承者 javax.swing.AbstractButton
                  继承者 javax.swing.JButton
所有已实现的接口:
ImageObserver, ItemSelectable, MenuContainer, Serializable, Accessible, SwingConstants
直接已知子类:
BasicArrowButton, MetalComboBoxButton

public class JButton
     
extends AbstractButton
implements Accessible

"push" 按钮的实现。

通过 Action 可配置按钮,并进行一定程度的控制。将 Action 用于按钮具有许多直接配置按钮所不及的优点。有关更多详细信息,请参阅支持的 Action Swing 组件,可在 The Java Tutorial 中的 How to Use Actions 一节找到更到信息。

有关使用按钮的更多信息和示例,请参阅 The Java Tutorial 中的 How to Use Buttons, Check Boxes, and Radio Buttons

警告: Swing 不是线程安全的。有关更多信息,请参阅 Swing's Threading Policy

警告:此类的序列化对象与以后的 Swing 版本不兼容。当前序列化支持适用于短期存储,或适用于在运行相同 Swing 版本的应用程序之间进行 RMI(Remote Method Invocation,远程方法调用)。从 1.4 版本开始,已在 java.beans 包中添加了支持所有 JavaBeansTM 长期存储的功能。请参见 XMLEncoder


嵌套类摘要
protected  class JButton.AccessibleJButton
          此类实现对 JButton 类的可访问性支持。
 
从类 javax.swing.AbstractButton 继承的嵌套类/接口
AbstractButton.AccessibleAbstractButton, AbstractButton.ButtonChangeListener
 
从类 javax.swing.JComponent 继承的嵌套类/接口
JComponent.AccessibleJComponent
 
从类 java.awt.Container 继承的嵌套类/接口
Container.AccessibleAWTContainer
 
从类 java.awt.Component 继承的嵌套类/接口
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy
 
字段摘要
 
从类 javax.swing.AbstractButton 继承的字段
actionListener, BORDER_PAINTED_CHANGED_PROPERTY, changeEvent, changeListener, CONTENT_AREA_FILLED_CHANGED_PROPERTY, DISABLED_ICON_CHANGED_PROPERTY, DISABLED_SELECTED_ICON_CHANGED_PROPERTY, FOCUS_PAINTED_CHANGED_PROPERTY, HORIZONTAL_ALIGNMENT_CHANGED_PROPERTY, HORIZONTAL_TEXT_POSITION_CHANGED_PROPERTY, ICON_CHANGED_PROPERTY, itemListener, MARGIN_CHANGED_PROPERTY, MNEMONIC_CHANGED_PROPERTY, model, MODEL_CHANGED_PROPERTY, PRESSED_ICON_CHANGED_PROPERTY, ROLLOVER_ENABLED_CHANGED_PROPERTY, ROLLOVER_ICON_CHANGED_PROPERTY, ROLLOVER_SELECTED_ICON_CHANGED_PROPERTY, SELECTED_ICON_CHANGED_PROPERTY, TEXT_CHANGED_PROPERTY, VERTICAL_ALIGNMENT_CHANGED_PROPERTY, VERTICAL_TEXT_POSITION_CHANGED_PROPERTY
 
从类 javax.swing.JComponent 继承的字段
accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
 
从类 java.awt.Component 继承的字段
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
 
从接口 javax.swing.SwingConstants 继承的字段
BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST
 
从接口 java.awt.image.ImageObserver 继承的字段
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
 
构造方法摘要
JButton()
          创建不带有设置文本或图标的按钮。
JButton(Action a)
          创建一个按钮,其属性从所提供的 Action 中获取。
JButton(Icon icon)
          创建一个带图标的按钮。
JButton(String text)
          创建一个带文本的按钮。
JButton(String text, Icon icon)
          创建一个带初始文本和图标的按钮。
 
方法摘要
 AccessibleContext getAccessibleContext()
          获取与此 JButton 关联的 AccessibleContext
 String getUIClassID()
          返回指定呈现此组件的 L&F 类名的字符串。
 boolean isDefaultButton()
          获取 defaultButton 属性的值,如果为 true 则意味着此按钮是其 JRootPane 的当前默认按钮。
 boolean isDefaultCapable()
          获取 defaultCapable 属性的值。
protected  String paramString()
          返回此 JButton 的字符串表示形式。
 void removeNotify()
          重写 JComponent.removeNotify 来检查此按钮当前是否被设置为 RootPane 上的默认按钮,如果是,则将 RootPane 的默认按钮设置为 null,以确保 RootPane 不继续停留在无效的按钮引用上。
 void setDefaultCapable(boolean defaultCapable)
          设置 defaultCapable 属性,该属性确定此按钮是否可以是其根窗格的默认按钮。
 void updateUI()
          根据当前外观的值重置 UI 属性。
 
从类 javax.swing.AbstractButton 继承的方法
actionPropertyChanged, addActionListener, addChangeListener, addImpl, addItemListener, checkHorizontalKey, checkVerticalKey, configurePropertiesFromAction, createActionListener, createActionPropertyChangeListener, createChangeListener, createItemListener, doClick, doClick, fireActionPerformed, fireItemStateChanged, fireStateChanged, getAction, getActionCommand, getActionListeners, getChangeListeners, getDisabledIcon, getDisabledSelectedIcon, getDisplayedMnemonicIndex, getHideActionText, getHorizontalAlignment, getHorizontalTextPosition, getIcon, getIconTextGap, getItemListeners, getLabel, getMargin, getMnemonic, getModel, getMultiClickThreshhold, getPressedIcon, getRolloverIcon, getRolloverSelectedIcon, getSelectedIcon, getSelectedObjects, getText, getUI, getVerticalAlignment, getVerticalTextPosition, imageUpdate, init, isBorderPainted, isContentAreaFilled, isFocusPainted, isRolloverEnabled, isSelected, paintBorder, removeActionListener, removeChangeListener, removeItemListener, setAction, setActionCommand, setBorderPainted, setContentAreaFilled, setDisabledIcon, setDisabledSelectedIcon, setDisplayedMnemonicIndex, setEnabled, setFocusPainted, setHideActionText, setHorizontalAlignment, setHorizontalTextPosition, setIcon, setIconTextGap, setLabel, setLayout, setMargin, setMnemonic, setMnemonic, setModel, setMultiClickThreshhold, setPressedIcon, setRolloverEnabled, setRolloverIcon, setRolloverSelectedIcon, setSelected, setSelectedIcon, setText, setUI, setVerticalAlignment, setVerticalTextPosition
 
从类 javax.swing.JComponent 继承的方法
addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update
 
从类 java.awt.Container 继承的方法
add, add, add, add, add, addContainerListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, transferFocusBackward, transferFocusDownCycle, validate, validateTree
 
从类 java.awt.Component 继承的方法
action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle
 
从类 java.lang.Object 继承的方法
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

构造方法详细信息

JButton

public JButton()
创建不带有设置文本或图标的按钮。


JButton

public JButton(Icon icon)
创建一个带图标的按钮。

参数:
icon - 显示在按钮上的 Icon 图像

JButton

public JButton(String text)
创建一个带文本的按钮。

参数:
text - 按钮的文本

JButton

public JButton(Action a)
创建一个按钮,其属性从所提供的 Action 中获取。

参数:
a - 用于指定新按钮的 Action
从以下版本开始:
1.3

JButton

public JButton(String text,
               Icon icon)
创建一个带初始文本和图标的按钮。

参数:
text - 按钮的文本
icon - 显示在按钮上的 Icon 图像
方法详细信息

updateUI

public void updateUI()
根据当前外观的值重置 UI 属性。

覆盖:
AbstractButton 中的 updateUI
另请参见:
JComponent.updateUI()

getUIClassID

public String getUIClassID()
返回指定呈现此组件的 L&F 类名的字符串。

覆盖:
JComponent 中的 getUIClassID
返回:
字符串 "ButtonUI"
另请参见:
JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

isDefaultButton

public boolean isDefaultButton()
获取 defaultButton 属性的值,如果为 true 则意味着此按钮是其 JRootPane 的当前默认按钮。大多数外观呈现不同的默认按钮,并且可能提供对访问默认按钮的绑定。

返回:
defaultButton 属性的值
另请参见:
JRootPane.setDefaultButton(javax.swing.JButton), isDefaultCapable()

isDefaultCapable

public boolean isDefaultCapable()
获取 defaultCapable 属性的值。

返回:
defaultCapable 属性的值
另请参见:
setDefaultCapable(boolean), isDefaultButton(), JRootPane.setDefaultButton(javax.swing.JButton)

setDefaultCapable

public void setDefaultCapable(boolean defaultCapable)
设置 defaultCapable 属性,该属性确定此按钮是否可以是其根窗格的默认按钮。除非由外观另行指定,否则 defaultCapable 属性的默认值为 true

参数:
defaultCapable - 如果此按钮可以是 RootPane 上的默认按钮,则该参数为 true;否则为 false
另请参见:
isDefaultCapable()

removeNotify

public void removeNotify()
重写 JComponent.removeNotify 来检查此按钮当前是否被设置为 RootPane 上的默认按钮,如果是,则将 RootPane 的默认按钮设置为 null,以确保 RootPane 不继续停留在无效的按钮引用上。

覆盖:
AbstractButton 中的 removeNotify
另请参见:
JComponent.registerKeyboardAction(java.awt.event.ActionListener, java.lang.String, javax.swing.KeyStroke, int)

paramString

protected String paramString()
返回此 JButton 的字符串表示形式。此方法仅在进行调试时使用,对于各个实现,所返回字符串的内容和格式可能有所不同。返回的字符串可以为空,但不可以为 null

覆盖:
AbstractButton 中的 paramString
返回:
JButton 的字符串表示形式

getAccessibleContext

public AccessibleContext getAccessibleContext()
获取与此 JButton 关联的 AccessibleContext。对于 JButtonAccessibleContext 采用 AccessibleJMenuItem 的形式。如有必要,可创建一个新的 AccessibleJButton 实例。

指定者:
接口 Accessible 中的 getAccessibleContext
覆盖:
JComponent 中的 getAccessibleContext
返回:
一个 AccessibleJButton,它充当此 JButtonAccessibleContext

JavaTM Platform
Standard Ed. 6

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