import java.awt.*; import java.awt.event.*; public class JanelaBotao extends Janela { Button b = new Button("OK"); class ButtonHandler implements ActionListener { public void actionPerformed(ActionEvent ae) { System.out.println(b.getActionCommand() +": " + ae); } } public JanelaBotao() { super("Janela com botao"); b.addActionListener(new ButtonHandler()); add(b); } public static void main(String[] args) { JanelaBotao jb = new JanelaBotao(); jb.setVisible(true); } }