The Panel class provides a generic Container within an existing display area.
public class java.awt.Panel
extends java.awt.Container {
// Constructors
public Panel();
public Panel(LayoutManager layout);
// Instance Methods
public void addNotify();
}
Constructs a Panel object.

Constructs a Panel object with the specified layout manager.
Container.addNotify()
Creates Panel's peer and peers of contained components.
Applet, Container