//file: DynamicHookupTest.javaimport javax.swing.*;import java.awt.event.*;public class DynamicHookupTest extends JFrame {  DynamicActionAdapter actionAdapter = new DynamicActionAdapter(  );  JLabel label = new JLabel( "Ready...", JLabel.CENTER );  int count;  public DynamicHookupTest(  ) {    JButton launchButton = new JButton("Launch!");    getContentPane(  ).add( launchButton, "South" );    getContentPane(  ).add( label, "Center" );    actionAdapter.hookup(launchButton, this, "launchTheMissiles");  }  public void launchTheMissiles(  ) {    label.setText("Launched: "+ count++ );  }  public static void main(String[] args) {    JFrame f = new DynamicHookupTest(  );    f.addWindowListener(new WindowAdapter(  ) {      public void windowClosing(WindowEvent we) { System.exit(0); }    });    f.setSize(150, 150);    f.setVisible( true );  }}