java.lang.Objectjava.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.AbstractButton
javax.swing.JButton
public class JButton
An implementation of a "push" button.
Buttons can be configured, and to some degree controlled, by Action s. 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 information and examples of using buttons.
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 JavaBeans TM has been added to the java.beans package. Please see XMLEncoder .
Nested Class Summary | |
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protected class |
JButton.AccessibleJButton
This class implements accessibility support for the JButton class. |
Nested classes/interfaces inherited from class javax.swing. AbstractButton |
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AbstractButton.AccessibleAbstractButton , AbstractButton.ButtonChangeListener |
Nested classes/interfaces inherited from class javax.swing. JComponent |
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JComponent.AccessibleJComponent |
Nested classes/interfaces inherited from class java.awt. Container |
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Container.AccessibleAWTContainer |
Nested classes/interfaces inherited from class java.awt. Component |
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Component.AccessibleAWTComponent , Component.BaselineResizeBehavior , Component.BltBufferStrategy , Component.FlipBufferStrategy |
Field Summary |
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Fields inherited from class javax.swing. JComponent |
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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 |
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BOTTOM_ALIGNMENT , CENTER_ALIGNMENT , LEFT_ALIGNMENT , RIGHT_ALIGNMENT , TOP_ALIGNMENT |
Fields inherited from interface javax.swing. SwingConstants |
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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 |
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ABORT , ALLBITS , ERROR , FRAMEBITS , HEIGHT , PROPERTIES , SOMEBITS , WIDTH |
Constructor Summary | |
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JButton
() Creates a button with no set text or icon. |
|
JButton
(
Action
a) Creates a button where properties are taken from the Action supplied. |
|
JButton
(
Icon
icon) Creates a button with an icon. |
|
JButton
(
String
text) Creates a button with text. |
|
JButton
(
String
text,
Icon
icon) Creates a button with initial text and an icon. |
Method Summary | |
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AccessibleContext |
getAccessibleContext
() Gets the AccessibleContext associated with this JButton. |
String |
getUIClassID
() Returns a string that specifies the name of the L&F class that renders this component. |
boolean |
isDefaultButton
() Gets the value of the defaultButton property, which if true means that this button is the current default button for its JRootPane. |
boolean |
isDefaultCapable
() Gets the value of the defaultCapable property. |
protected String |
paramString
() Returns a string representation of this JButton. |
void |
removeNotify
() Overrides JComponent.removeNotify to check if this button is currently set as the default button on the RootPane, and if so, sets the RootPane's default button to null to ensure the RootPane doesn't hold onto an invalid button reference. |
void |
setDefaultCapable
(boolean defaultCapable) Sets the defaultCapable property, which determines whether this button can be made the default button for its root pane. |
void |
updateUI
() Resets the UI property to a value from the current look and feel. |
Methods inherited from class java.lang. Object |
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clone , equals , finalize , getClass , hashCode , notify , notifyAll , wait , wait , wait |
Constructor Detail |
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public JButton()
public JButton(Icon icon)
public JButton(String text)
public JButton(Action a)
public JButton(String text, Icon icon)
Method Detail |
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public void updateUI()
public String getUIClassID()
public boolean isDefaultButton()
public boolean isDefaultCapable()
public void setDefaultCapable(boolean defaultCapable)
public void removeNotify()
protected String paramString()
public AccessibleContext getAccessibleContext()