Module java.desktop

软件包 javax.swing

Class JButton

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.AbstractButton

javax.swing.JButton

All Implemented Interfaces:

ImageObserver ， ItemSelectable ， MenuContainer ， Serializable ， Accessible ， SwingConstants

已知直接子类：

BasicArrowButton ， MetalComboBoxButton

@JavaBean(defaultProperty="UIClassID",
          description="An implementation of a \"push\" button.")
public class JButton
extends AbstractButton
implements Accessible

实现“推”按钮。

按钮可以配置，并在一定程度上由Action控制。 使用带有按钮的Action除了直接配置按钮之外，还有许多优点。 有关更多详细信息，请参阅Swing Components Supporting Action ，您可以在“Java教程”一节中的 How to Use Actions中找到更多信息。

有关使用按钮的信息和示例，请参阅Java教程中的 How to Use Buttons, Check Boxes, and Radio Buttons 。

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

警告：此类的序列化对象与将来的Swing版本不兼容。 当前的序列化支持适用于运行相同版本的Swing的应用程序之间的短期存储或RMI。 从1.4版本开始，所有JavaBeans的长期存储支持已被添加到java.beans软件包中。 请参阅XMLEncoder 。

从以下版本开始：

1.2

另请参见：

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	描述
protected class	JButton.AccessibleJButton	该类实现 JButton类的可访问性支持。

Nested classes/interfaces inherited from class javax.swing.AbstractButton

AbstractButton.AccessibleAbstractButton, AbstractButton.ButtonChangeListener

Nested classes/interfaces inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Nested classes/interfaces inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent

Field Summary

Fields inherited from class javax.swing.AbstractButton

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

Fields inherited from class java.awt.Component

accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Fields inherited from class javax.swing.JComponent

listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from interface javax.swing.SwingConstants

BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

构造方法摘要

构造方法

Constructor	描述
JButton()	创建一个没有设置文本或图标的按钮。
JButton(String text)	创建一个带文本的按钮。
JButton(String text, Icon icon)	创建一个带有初始文本和图标的按钮。
JButton(Action a)	Action
JButton(Icon icon)	创建一个带有图标的按钮。

方法摘要

Modifier and Type	方法	描述
AccessibleContext	getAccessibleContext()	获取 AccessibleContext与此 JButton相关联。
String	getUIClassID()	返回一个字符串，它指定呈现此组件的L＆F类的名称。
boolean	isDefaultButton()	获取 defaultButton属性的值，如果 true表示该按钮是其 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 JButton 。
void	removeNotify()	覆盖 JComponent.removeNotify以检查此按钮当前是否设置为 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不会保持无效的按钮参考。
void	setDefaultCapable(boolean defaultCapable)	设置 defaultCapable属性，该属性确定此按钮是否可以作为其根窗格的默认按钮。
void	updateUI()	将UI属性重置为当前外观的值。

Methods inherited from class javax.swing.AbstractButton

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

Methods inherited from class java.awt.Component

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, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, 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, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.awt.Container

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, transferFocusDownCycle, validate, validateTree

Methods inherited from class javax.swing.JComponent

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, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, 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

Methods inherited from class java.lang.Object

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

构造方法详细信息

JButton

public JButton()

创建一个没有设置文本或图标的按钮。

JButton

public JButton(Icon icon)

创建一个带有图标的按钮。

参数

icon - 按钮上显示的图标图像

JButton

@ConstructorProperties("text")
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，其属性取自提供的 Action 。

参数

a - Action用于指定新的按钮

从以下版本开始：

1.3

JButton

public JButton(String text,
               Icon icon)

创建一个带有初始文本和图标的按钮。

参数

text - 按钮的文字

icon

方法详细信息

updateUI

public void updateUI()

将UI属性重置为当前外观的值。

重写：

updateUI在 AbstractButton

另请参见：

JComponent.updateUI()

getUIClassID

@BeanProperty(bound=false,
              expert=true,
              description="A string that specifies the name of the L&F class.")
public String getUIClassID()

返回一个字符串，它指定呈现此组件的L＆F类的名称。

重写：

getUIClassID在 JComponent

结果

字符串“ButtonUI”

另请参见：

JComponent.getUIClassID() ， UIDefaults.getUI(javax.swing.JComponent)

isDefaultButton

@BeanProperty(bound=false,
              description="Whether or not this button is the default button")
public boolean isDefaultButton()

获取defaultButton属性的值，如果true表示此按钮是其JRootPane的当前默认按钮。 大多数外观和感觉呈现默认按钮不同，并可能提供绑定来访问默认按钮。

结果

的价值 defaultButton属性

另请参见：

JRootPane.setDefaultButton(javax.swing.JButton) ， isDefaultCapable()

isDefaultCapable

public boolean isDefaultCapable()

获取 defaultCapable属性的值。

结果

该值为 defaultCapable属性

另请参见：

setDefaultCapable(boolean) ， isDefaultButton() ， JRootPane.setDefaultButton(javax.swing.JButton)

setDefaultCapable

@BeanProperty(visualUpdate=true,
              description="Whether or not this button can be the default button")
public void setDefaultCapable(boolean defaultCapable)

设置defaultCapable属性，该属性确定此按钮是否可以作为其根窗格的默认按钮。 defaultCapable属性的默认值为true除非外观和外观另有规定。

参数

defaultCapable - true如果此按钮将能够成为RootPane上的默认按钮; 否则false

另请参见：

isDefaultCapable()

removeNotify

public void removeNotify()

覆盖 JComponent.removeNotify以检查此按钮当前是否设置为 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不会保持无效的按钮参考。

重写：

removeNotify在 AbstractButton

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JButton 。 该方法仅用于调试目的，并且返回的字符串的内容和格式可能因实现而异。 返回的字符串可能为空，但可能不是null 。

重写：

paramString在 AbstractButton

结果

这个 JButton的字符串表示 JButton

getAccessibleContext

@BeanProperty(bound=false,
              expert=true,
              description="The AccessibleContext associated with this Button.")
public AccessibleContext getAccessibleContext()

获取AccessibleContext与此相关JButton 。 为JButton s时， AccessibleContext需要一个的形式AccessibleJButton 。 如有必要，将创建一个新的AccessibleJButton实例。

Specified by:

getAccessibleContext在接口 Accessible

重写：

getAccessibleContext在 Component

结果

一个 AccessibleJButton ，作为这个 AccessibleContext的 JButton