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java.lang.Objectjava.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JPanel
public class JPanel
An instance of JPanel can be added to a panel, frame etc
Nested Class Summary | |
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protected class |
JPanel.AccessibleJPanel
Provides accessibility support for JPanel . |
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.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 java.awt.image.ImageObserver |
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ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH |
Constructor Summary | |
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JPanel()
Creates a new panel with a new instance of FlowLayout as the
layout manager and double-buffering enabled. |
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JPanel(boolean isDoubleBuffered)
Creates a new panel with double-buffering enabled or disabled as specified. |
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JPanel(LayoutManager layout)
Creates a new panel with the specified layout manager. |
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JPanel(LayoutManager layout,
boolean isDoubleBuffered)
Creates a new panel with the specified layout manager and double-buffering. |
Method Summary | |
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AccessibleContext |
getAccessibleContext()
Returns the object that provides accessibility features for this JPanel component. |
PanelUI |
getUI()
Returns the UI delegate for the JPanel component. |
String |
getUIClassID()
Returns the suffix ( "PanelUI" in this case) used to
determine the class name for a UI delegate that can provide the look and
feel for a JPanel . |
protected String |
paramString()
Returns an implementation-dependent string describing the attributes of this JPanel . |
void |
setUI(PanelUI ui)
Sets the UI delegate for the JPanel component. |
void |
updateUI()
Sets this panel's UI delegate to the default (obtained from the UIManager ) for 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 JPanel()
FlowLayout
as the
layout manager and double-buffering enabled.
public JPanel(boolean isDoubleBuffered)
FlowLayout
.
isDoubleBuffered
- a flag that controls whether or not
double-buffering is enabled.public JPanel(LayoutManager layout)
layout
- the layout manager (null
permitted).public JPanel(LayoutManager layout, boolean isDoubleBuffered)
layout
- the layout manager (null
permitted).isDoubleBuffered
- a flag that controls whether or not
double-buffering is enabled.Method Detail |
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public String getUIClassID()
"PanelUI"
in this case) used to
determine the class name for a UI delegate that can provide the look and
feel for a JPanel
.
getUIClassID
in class JComponent
"PanelUI"
.JComponent.setUI(javax.swing.plaf.ComponentUI)
,
JComponent.updateUI()
public void setUI(PanelUI ui)
JPanel
component.
ui
- the UI delegate.getUI()
public PanelUI getUI()
JPanel
component.
setUI(PanelUI)
public void updateUI()
UIManager
) for the current look and feel.
updateUI
in class JComponent
public AccessibleContext getAccessibleContext()
JPanel
component.
getAccessibleContext
in interface Accessible
getAccessibleContext
in class JComponent
JPanel.AccessibleJPanel
).protected String paramString()
JPanel
.
paramString
in class JComponent
JPanel
(never null
).
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