Package Summary Overview Summary

### class:JPanel [NONE]
- All Implemented Interfaces: ImageObserver, MenuContainer, Serializable, Accessible Direct Known Subclasses: AbstractColorChooserPanel, JSpinner.DefaultEditor
      public class JPanel
      extends JComponent
      implements Accessible
`JPanel` is a generic lightweight container. For examples and task-oriented documentation for JPanel, see How to Use Panels , a section in The Java Tutorial . 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™ has been added to the `java.beans` package. Please see `XMLEncoder`. Since: 1.2

### constructor:JPanel(java.awt.LayoutManager, boolean) [NONE]
- #### JPanel
      public JPanel(LayoutManager layout,
                    boolean isDoubleBuffered)
Creates a new JPanel with the specified layout manager and buffering strategy. Parameters: `layout` - the LayoutManager to use `isDoubleBuffered` - a boolean, true for double-buffering, which uses additional memory space to achieve fast, flicker-free updates

### constructor:JPanel(java.awt.LayoutManager) [NONE]
- #### JPanel
      public JPanel(LayoutManager layout)
Create a new buffered JPanel with the specified layout manager Parameters: `layout` - the LayoutManager to use

### constructor:JPanel(boolean) [NONE]
- #### JPanel
      public JPanel(boolean isDoubleBuffered)
Creates a new `JPanel` with `FlowLayout` and the specified buffering strategy. If `isDoubleBuffered` is true, the `JPanel` will use a double buffer. Parameters: `isDoubleBuffered` - a boolean, true for double-buffering, which uses additional memory space to achieve fast, flicker-free updates

### constructor:JPanel() [NONE]
- #### JPanel
      public JPanel()
Creates a new `JPanel` with a double buffer and a flow layout.

### method:updateUI() [NONE]
- #### updateUI
      public void updateUI()
Resets the UI property with a value from the current look and feel. Overrides: `updateUI` in class `JComponent` See Also: `JComponent.updateUI()`

### method:getUI() [NONE]
- #### getUI
      public PanelUI getUI()
Returns the look and feel (L&amp;F) object that renders this component. Returns: the PanelUI object that renders this component Since: 1.4

### method:setUI(javax.swing.plaf.PanelUI) [NONE]
- #### setUI
      public void setUI(PanelUI ui)
Sets the look and feel (L&F) object that renders this component. Parameters: `ui` - the PanelUI L&F object Since: 1.4 See Also: `UIDefaults.getUI(javax.swing.JComponent)`

### method:getUIClassID() [NONE]
- #### getUIClassID
      public String getUIClassID()
Returns a string that specifies the name of the L&F class that renders this component. Overrides: `getUIClassID` in class `JComponent` Returns: "PanelUI" See Also: `JComponent.getUIClassID()`, `UIDefaults.getUI(javax.swing.JComponent)`

### method:paramString() [NONE]
- #### paramString
      protected String paramString()
Returns a string representation of this JPanel. 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: `paramString` in class `JComponent` Returns: a string representation of this JPanel.

### method:getAccessibleContext() [NONE]
- #### getAccessibleContext
      public AccessibleContext getAccessibleContext()
Gets the AccessibleContext associated with this JPanel. For JPanels, the AccessibleContext takes the form of an AccessibleJPanel. A new AccessibleJPanel instance is created if necessary. Specified by: `getAccessibleContext` in interface `Accessible` Overrides: `getAccessibleContext` in class `Component` Returns: an AccessibleJPanel that serves as the AccessibleContext of this JPanel