23. Using JPanel

• Plain borderless surface

  • holds lightweight UI components

  • supports double-buffering (default buffering for Java GUI)

    • Note: JPanel uses additional memory to draw offscreen when the panel is updated

• Constructors:

  
      JPanel()
      JPanel( LayoutManager layout )
      JPanel( Boolean isDoubleBuffered )
      JPanel( LayoutManager layout, Boolean isDoubleBuffered )