Java Swing - 如何处理单击事件与切换按钮的动作侦听器

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.AbstractButton;
import javax.swing.JFrame;
import javax.swing.JToggleButton;

public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JToggleButton toggleButton = new JToggleButton("Toggle Button");
    // Define ActionListener
    ActionListener actionListener = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        AbstractButton abstractButton = (AbstractButton) actionEvent.getSource();
        boolean selected = abstractButton.getModel().isSelected();
        System.out.println("Action - selected=" + selected + "\n");
      }
    };
    // Attach Listeners
    toggleButton.addActionListener(actionListener);
    frame.add(toggleButton, BorderLayout.NORTH);
    frame.setSize(300, 125);
    frame.setVisible(true);
  }
}