public class CompositedNOTInheritedFrame {
 
      private static final long serialVersionUID = 1L;
 
      private final JFrame frame = new JFrame("NOT inherited but 
composited Frame");
 
      private final JTextField textField = new JTextField();
      private final JButton button = new JButton("OK");
 
      public CompositedNOTInheritedFrame() {
          Container contentPane = frame.getContentPane();
          contentPane.setLayout(new FlowLayout());
          textField.setColumns(10);
          contentPane.add(textField);
          contentPane.add(button);
          frame.pack();
 
          button.addActionListener(new ActionListener() {
              public void actionPerformed(ActionEvent event) {
                  JOptionPane.showMessageDialog(null, "Text field value 
= " + textField.getText());
              }
          });
      }
 
      public void setVisible(boolean a) {
          frame.setVisible(a);
      }
  }