javax.swing
类 JRadioButton

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              javax.swing.AbstractButton
                  javax.swing.JToggleButton
                      javax.swing.JRadioButton

所有已实现的接口：

ImageObserver, ItemSelectable, MenuContainer, Serializable, Accessible, SwingConstants

public class JRadioButton
extends JToggleButton
implements Accessible

实现一个单选按钮，此按钮项可被选择或取消选择，并可为用户显示其状态。与 ButtonGroup 对象配合使用可创建一组按钮，一次只能选择其中的一个按钮。（创建一个 ButtonGroup 对象并用其 add 方法将 JRadioButton 对象包含在此组中。）

注：ButtonGroup 对象为逻辑分组，不是物理分组。要创建按钮面板，仍需要创建一个 JPanel 或类似的容器对象并将 Border 添加到其中以便将面板与周围的组件分开。

通过 Action 可以配置按钮，并进行一定程度的控制。对按钮使用 Action 有许多直接配置按钮所不及的优点。有关更多信息，请参阅支持 Action 的 Swing 组件，可以在 The Java Tutorial 中的 How to Use Actions 一节找到更多信息。

有关更多内容，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 JavaBeans^TM 长期存储的功能。请参见 XMLEncoder。

另请参见：

ButtonGroup, JCheckBox

嵌套类摘要

protected class

JRadioButton.AccessibleJRadioButton 此类实现对 JRadioButton 类的可访问性支持。

从类 javax.swing.JToggleButton 继承的嵌套类/接口

JToggleButton.AccessibleJToggleButton, JToggleButton.ToggleButtonModel

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

JRadioButton()
创建一个初始化为未选择的单选按钮，其文本未设定。

JRadioButton(Action a)
创建一个单选按钮，其属性来自提供的 Action。

JRadioButton(Icon icon)
创建一个初始化为未选择的单选按钮，其具有指定的图像但无文本。

JRadioButton(Icon icon, boolean selected)
创建一个具有指定图像和选择状态的单选按钮，但无文本。

JRadioButton(String text)
创建一个具有指定文本的状态为未选择的单选按钮。

JRadioButton(String text, boolean selected)
创建一个具有指定文本和选择状态的单选按钮。

JRadioButton(String text, Icon icon)
创建一个具有指定的文本和图像并初始化为未选择的单选按钮。

JRadioButton(String text, Icon icon, boolean selected)
创建一个具有指定的文本、图像和选择状态的单选按钮。

方法摘要

AccessibleContext	getAccessibleContext() 获取与此 JRadioButton 相关联的 AccessibleContext。
String	getUIClassID() 返回呈现此组件的 L&F 类的名称。
protected String	paramString() 返回此 JRadioButton 的字符串表示形式。
void	updateUI() 将 UI 属性重置为当前外观对应的值。

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, removeNotify, 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

JRadioButton

public JRadioButton()

创建一个初始化为未选择的单选按钮，其文本未设定。

JRadioButton

public JRadioButton(Icon icon)

创建一个初始化为未选择的单选按钮，其具有指定的图像但无文本。

参数：

icon - 此按钮应显示的图像

JRadioButton

public JRadioButton(Action a)

创建一个单选按钮，其属性来自提供的 Action。

从以下版本开始：

1.3

JRadioButton

public JRadioButton(Icon icon,
                    boolean selected)

创建一个具有指定图像和选择状态的单选按钮，但无文本。

参数：

icon - 此按钮应显示的图像

selected - 如果为 true，按钮被初始化为选择；否则，按钮被初始化为未选择

JRadioButton

public JRadioButton(String text)

创建一个具有指定文本的状态为未选择的单选按钮。

参数：

text - 单选按钮上显示的字符串

JRadioButton

public JRadioButton(String text,
                    boolean selected)

创建一个具有指定文本和选择状态的单选按钮。

参数：

text - 单选按钮上显示的字符串

selected - 如果为 true，按钮被初始化为选择；否则，按钮被初始化为未选择

JRadioButton

public JRadioButton(String text,
                    Icon icon)

创建一个具有指定的文本和图像并初始化为未选择的单选按钮。

参数：

text - 此单选按钮上显示的字符串

icon - 此按钮应显示的图像

JRadioButton

public JRadioButton(String text,
                    Icon icon,
                    boolean selected)

创建一个具有指定的文本、图像和选择状态的单选按钮。

参数：

text - 此单选按钮上显示的字符串

icon - 此按钮应显示的图像

方法详细信息

updateUI

public void updateUI()

将 UI 属性重置为当前外观对应的值。

覆盖：

类 JToggleButton 中的 updateUI

另请参见：

JComponent.updateUI()

getUIClassID

public String getUIClassID()

返回呈现此组件的 L&F 类的名称。

覆盖：

类 JToggleButton 中的 getUIClassID

返回：

"RadioButtonUI" 字符串

另请参见：

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

paramString

protected String paramString()

返回此 JRadioButton 的字符串表示形式。此方法仅在进行调试的时候使用，对于各个实现，所返回字符串的内容和格式可能有所不同。返回的字符串可能为空，但不可能为 null。

覆盖：

类 JToggleButton 中的 paramString

返回：

此 JRadioButton 的字符串表示形式。

getAccessibleContext

public AccessibleContext getAccessibleContext()

获取与此 JRadioButton 相关联的 AccessibleContext。对于 JRadioButton，AccessibleContext 采用 AccessibleJRadioButton 的形式。必要时创建新的 AccessibleJRadioButton 实例。

指定者：

接口 Accessible 中的 getAccessibleContext

覆盖：

类 JToggleButton 中的 getAccessibleContext

返回：

一个 AccessibleJRadioButton，它将充当此 JRadioButton 的 AccessibleContext