19. CardLayout example

• 
  import javax.swing.*;
  import java.awt.*;
  
  public class FrameWithCardLayout extends JFrame
  {
     private JButton nb = new JButton( "North" );
     private JButton sb = new JButton( "South" );
     private JButton eb = new JButton( "East" );
     private JButton wb = new JButton( "West" );
     private JButton cb = new JButton( "Center" );
  
     public FrameWithCardLayout()
     {
        setLayout( new CardLayout() );
        add( "north", nb );
        add( "south", sb );
        add( "east", eb );
        add( "west", wb );
        add( "center", cb );
        setSize( 250, 250 );
        setVisible( true );
        setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
     }
  
     public static void main(String[] ags)
     {
        FrameWithCardLayout jbl = new FrameWithCardLayout();
     }
  }//class FrameWithCardLayout