动作事件监听器

public class SimpleEvent extends JFrame{
    private JButton jb = new JButton("我是按钮，单击我");
    public SimpleEvent() {
        // TODO Auto-generated constructor stub
        setLayout(null);
        Container cp = getContentPane();
        cp.add(jb);
        jb.setBounds(10,10,100,30);
        jb.addActionListener(new jbAction());
        setVisible(true);
        setSize(300,300);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    class  jbAction implements ActionListener{
        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
        jb.setText("我被单击了");    
        }
    }
     public static void main(String[] args) {
        // TODO Auto-generated method stub
         new SimpleEvent();
    }

}