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Class com.sun.java.swing.JPanel 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----com.sun.java.swing.JComponent
                           |
                           +----com.sun.java.swing.JPanel
public class JPanel
extends JComponent
A lightweight panel that provides double buffering support.

Variable Index

o darkGray
o ETCHED
o gray
o lightGray
o LOWERED
o NONE
o RAISED

Constructor Index

o JPanel()
Creates a Lightweight Panel
o JPanel(boolean)
Creates a Lightweight Panel.
o JPanel(LayoutManager)
Creates a new panel with the specified layout manager.

Method Index

o createOffscreenImage()
o getBorderStyle()
Returns the style of the border.
o invalidate()
Invalidates the panel.
o isBuffered()
Returns whether this panel is double buffered.
o isOpaque()
o paint(Graphics)
Paints the panel
o paintBorder(Graphics)
o setBackgroundCleared(boolean)
Sets whether the paint method fills the background before painting.
o setBorderStyle(int)
Set the style of the border.
o setBounds(int, int, int, int)
Override setBounds to null out the offscreen buffer.
o setBuffered(boolean)
If b is "true", then all painting is double buffered.
o validate()
Validates the panel.

Variables

o NONE 
 public static final int NONE
o LOWERED 
 public static final int LOWERED
o RAISED 
 public static final int RAISED
o ETCHED 
 public static final int ETCHED
o darkGray 
 public static final Color darkGray
o gray 
 public static final Color gray
o lightGray 
 public static final Color lightGray

Constructors

o JPanel 
 public JPanel()
Creates a Lightweight Panel

o JPanel 
 public JPanel(LayoutManager layout)
Creates a new panel with the specified layout manager.

Parameters:
layout - the layout manager for this panel
o JPanel 
 public JPanel(boolean buffered)
Creates a Lightweight Panel. If buffered is "true", then all painting will be double buffered.

Methods

o isBuffered 
 public boolean isBuffered()
Returns whether this panel is double buffered.

o setBuffered 
 public void setBuffered(boolean b)
If b is "true", then all painting is double buffered.

o getBorderStyle 
 public int getBorderStyle()
Returns the style of the border.

o setBorderStyle 
 public void setBorderStyle(int borderStyle)
Set the style of the border.

o validate 
 public void validate()
Validates the panel. If the panel needs double buffering, it probes upwards to determine if a parent is already double buffering. If one is found, then this panel will not do the buffering.

Overrides:
validate in class Container
o createOffscreenImage 
 protected void createOffscreenImage()
o invalidate 
 public void invalidate()
Invalidates the panel.

Overrides:
invalidate in class Container
o setBounds 
 public void setBounds(int x,
                       int y,
                       int w,
                       int h)
Override setBounds to null out the offscreen buffer.

Overrides:
setBounds in class JComponent
o isOpaque 
 public boolean isOpaque()
Overrides:
isOpaque in class JComponent
o setBackgroundCleared 
 public void setBackgroundCleared(boolean b)
Sets whether the paint method fills the background before painting.

o paint 
 public void paint(Graphics g)
Paints the panel

Overrides:
paint in class JComponent
o paintBorder 
 public void paintBorder(Graphics g)

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