File	Doc	Category	Size	Date	Package
JPanel.java	API Doc	Java SE 6 API	7049	Tue Jun 10 00:26:38 BST 2008	javax.swing

JPanel

• java.lang.Object
  • java.awt.Component
    • java.awt.Container
      • javax.swing.JComponent

Fields Summary
private static final String	uiClassID

Constructors Summary
public JPanel(LayoutManager layout, boolean isDoubleBuffered) Creates a new JPanel with the specified layout manager and buffering strategy. param layout the LayoutManager to use param isDoubleBuffered a boolean, true for double-buffering, which uses additional memory space to achieve fast, flicker-free updates setLayout(layout); setDoubleBuffered(isDoubleBuffered); setUIProperty("opaque", Boolean.TRUE); updateUI();
public JPanel(LayoutManager layout) Create a new buffered JPanel with the specified layout manager param layout the LayoutManager to use this(layout, true);
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. param isDoubleBuffered a boolean, true for double-buffering, which uses additional memory space to achieve fast, flicker-free updates this(new FlowLayout(), isDoubleBuffered);
public JPanel() Creates a new JPanel with a double buffer and a flow layout. this(true);

Methods Summary
public javax.accessibility.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. return an AccessibleJPanel that serves as the AccessibleContext of this JPanel if (accessibleContext == null) { accessibleContext = new AccessibleJPanel(); } return accessibleContext;
public javax.swing.plaf.PanelUI	getUI() Returns the look and feel (L&F) object that renders this component. return the PanelUI object that renders this component since 1.4 return (PanelUI)ui;
public java.lang.String	getUIClassID() Returns a string that specifies the name of the L&F class that renders this component. return "PanelUI" see JComponent#getUIClassID see UIDefaults#getUI beaninfo expert: true description: A string that specifies the name of the L&F class. return uiClassID;
protected java.lang.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. return a string representation of this JPanel. return super.paramString();
public void	setUI(javax.swing.plaf.PanelUI ui) Sets the look and feel (L&F) object that renders this component. param ui the PanelUI L&F object see UIDefaults#getUI since 1.4 beaninfo bound: true hidden: true attribute: visualUpdate true description: The UI object that implements the Component's LookAndFeel. super.setUI(ui);
public void	updateUI() Resets the UI property with a value from the current look and feel. see JComponent#updateUI setUI((PanelUI)UIManager.getUI(this));
private void	writeObject(java.io.ObjectOutputStream s) See readObject() and writeObject() in JComponent for more information about serialization in Swing. s.defaultWriteObject(); if (getUIClassID().equals(uiClassID)) { byte count = JComponent.getWriteObjCounter(this); JComponent.setWriteObjCounter(this, --count); if (count == 0 && ui != null) { ui.installUI(this); } }