JRadioButton (Java Platform SE 6)
javax.swing
Class JRadioButton
java.lang.Object java.awt.Component java.awt.Container javax.swing.JComponent javax.swing.AbstractButton javax.swing.JToggleButton javax.swing.JRadioButton
- All Implemented Interfaces:
- ImageObserver, ItemSelectable, MenuContainer, Serializable, Accessible, SwingConstants
public class JRadioButton
- extends JToggleButton
- implements Accessible
An implementation of a radio button -- an item that can be selected or
deselected, and which displays its state to the user.
Used with a ButtonGroup object to create a group of buttons
in which only one button at a time can be selected. (Create a ButtonGroup
object and use its add method to include the JRadioButton objects
in the group.)
Note: The ButtonGroup object is a logical grouping -- not a physical grouping. Tocreate a button panel, you should still create aJPanelor similar container-object and add aBorderto it to set it off from surrounding components.
Buttons can be configured, and to some degree controlled, by
Actions. Using an
Action with a button has many benefits beyond directly
configuring a button. Refer to
Swing Components Supporting Action for more
details, and you can find more information in How
to Use Actions, a section in The Java Tutorial.
See How to Use Buttons, Check Boxes, and Radio Buttons in The Java Tutorial for further documentation.
Warning: Swing is not thread safe. For more information see Swing's Threading Policy.
Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing. As of 1.4, support for long term storage
of all JavaBeansTM
has been added to the java.beans package.
Please see XMLEncoder.
- See Also:
ButtonGroup,JCheckBox
| Nested Class Summary | |
|---|---|
protected class |
JRadioButton.AccessibleJRadioButton
This class implements accessibility support for the JRadioButton class. |
| Nested classes/interfaces inherited from class javax.swing.JToggleButton |
|---|
JToggleButton.AccessibleJToggleButton, JToggleButton.ToggleButtonModel |
| Nested classes/interfaces inherited from class javax.swing.AbstractButton |
|---|
AbstractButton.AccessibleAbstractButton, AbstractButton.ButtonChangeListener |
| Nested classes/interfaces inherited from class javax.swing.JComponent |
|---|
JComponent.AccessibleJComponent |
| Nested classes/interfaces inherited from class java.awt.Container |
|---|
Container.AccessibleAWTContainer |
| Nested classes/interfaces inherited from class java.awt.Component |
|---|
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy |
| Field Summary |
|---|
| Fields inherited from class javax.swing.JComponent |
|---|
accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW |
| Fields inherited from class java.awt.Component |
|---|
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT |
| 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 |
| Fields inherited from interface java.awt.image.ImageObserver |
|---|
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH |
| Constructor Summary | |
|---|---|
JRadioButton()
Creates an initially unselected radio button with no set text. |
|
JRadioButton(Action a)
Creates a radiobutton where properties are taken from the Action supplied. |
|
JRadioButton(Icon icon)
Creates an initially unselected radio button with the specified image but no text. |
|
JRadioButton(Icon icon,
boolean selected)
Creates a radio button with the specified image and selection state, but no text. |
|
JRadioButton(String text)
Creates an unselected radio button with the specified text. |
|
JRadioButton(String text,
boolean selected)
Creates a radio button with the specified text and selection state. |
|
JRadioButton(String text,
Icon icon)
Creates a radio button that has the specified text and image, and that is initially unselected. |
|
JRadioButton(String text,
Icon icon,
boolean selected)
Creates a radio button that has the specified text, image, and selection state. |
|
| Method Summary | |
|---|---|
AccessibleContext |
getAccessibleContext()
Gets the AccessibleContext associated with this JRadioButton. |
String |
getUIClassID()
Returns the name of the L&F class that renders this component. |
protected String |
paramString()
Returns a string representation of this JRadioButton. |
void |
updateUI()
Resets the UI property to a value from the current look and feel. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
JRadioButton
public JRadioButton()
- Creates an initially unselected radio button with no set text.
JRadioButton
public JRadioButton(Icon icon)
- Creates an initially unselected radio button
with the specified image but no text.
- Parameters:
icon- the image that the button should display
JRadioButton
public JRadioButton(Action a)
- Creates a radiobutton where properties are taken from the
Action supplied.
- Since:
- 1.3
JRadioButton
public JRadioButton(Icon icon, boolean selected)
- Creates a radio button with the specified image
and selection state, but no text.
- Parameters:
icon- the image that the button should displayselected- if true, the button is initially selected; otherwise, the button is initially unselected
JRadioButton
public JRadioButton(String text)
- Creates an unselected radio button with the specified text.
- Parameters:
text- the string displayed on the radio button
JRadioButton
public JRadioButton(String text, boolean selected)
- Creates a radio button with the specified text
and selection state.
- Parameters:
text- the string displayed on the radio buttonselected- if true, the button is initially selected; otherwise, the button is initially unselected
JRadioButton
public JRadioButton(String text, Icon icon)
- Creates a radio button that has the specified text and image,
and that is initially unselected.
- Parameters:
text- the string displayed on the radio buttonicon- the image that the button should display
JRadioButton
public JRadioButton(String text, Icon icon, boolean selected)
- Creates a radio button that has the specified text, image,
and selection state.
- Parameters:
text- the string displayed on the radio buttonicon- the image that the button should display
| Method Detail |
|---|
updateUI
public void updateUI()
- Resets the UI property to a value from the current look and feel.
- Overrides:
updateUIin classJToggleButton
- See Also:
JComponent.updateUI()
getUIClassID
public String getUIClassID()
- Returns the name of the L&F class
that renders this component.
- Overrides:
getUIClassIDin classJToggleButton
- Returns:
- String "RadioButtonUI"
- See Also:
JComponent.getUIClassID(),UIDefaults.getUI(javax.swing.JComponent)
paramString
protected String paramString()
- Returns a string representation of this JRadioButton. This method
is intended to be used only for debugging purposes, and the
content and format of the returned string may vary between
implementations. The returned string may be empty but may not
be
null. - Overrides:
paramStringin classJToggleButton
- Returns:
- a string representation of this JRadioButton.
getAccessibleContext
public AccessibleContext getAccessibleContext()
- Gets the AccessibleContext associated with this JRadioButton.
For JRadioButtons, the AccessibleContext takes the form of an
AccessibleJRadioButton.
A new AccessibleJRadioButton instance is created if necessary.
- Specified by:
getAccessibleContextin interfaceAccessible- Overrides:
getAccessibleContextin classJToggleButton
- Returns:
- an AccessibleJRadioButton that serves as the AccessibleContext of this JRadioButton
Submit a bug or feature
For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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