Kompositum, Beispiel

public class Composite  {
  public static void main(String[] args) {
    JFrame f = new JFrame ("Composite");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container c = new JPanel (new BorderLayout());
    c.add (new JButton ("foo"), BorderLayout.CENTER);
    f.getContentPane().add(c);
    f.pack(); f.setVisible(true);
  } 
}

Übung: geschachtelte Layouts bauen, vgl. http://www.imn.htwk-leipzig.de/~waldmann/edu/ws06/informatik/manage/