//通过内部类实现监听器
public class ActionMonitor extends JFrame {
    JButton button;
    public ActionMonitor(){
        this.setLayout(null);//布局
        this.setSize(500,400);//大小
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置可以关闭
        button =new JButton();
        button.setBounds(200, 200, 100, 20);//位置和大小
        ActionM am=new ActionM();
        button.addActionListener(am);//添加监听
        this.setVisible(true);
        this.add(button);
        //设置可见性
    }
    public static void main(String[] args) {
        ActionMonitor am= new ActionMonitor();
    }
    class ActionM implements ActionListener{


        @Override
        public void actionPerformed(ActionEvent e) {
            //TODO Auto-generated method stub

        }

    }
}