在swing应用程序中放在哪里以及如何使用windowlistener并通过按钮调用它？

import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

class MyWindowListener implements WindowListener {
    public void windowOpened(WindowEvent e) {
        // 窗口打开时的操作
    }

    public void windowClosing(WindowEvent e) {
        // 窗口关闭时的操作
    }

    public void windowClosed(WindowEvent e) {
        // 窗口关闭后的操作
    }

    public void windowIconified(WindowEvent e) {
        // 窗口最小化时的操作
    }

    public void windowDeiconified(WindowEvent e) {
        // 窗口恢复时的操作
    }

    public void windowActivated(WindowEvent e) {
        // 窗口激活时的操作
    }

    public void windowDeactivated(WindowEvent e) {
        // 窗口失去焦点时的操作
    }
}

JFrame frame = new JFrame("My Swing Application");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

MyWindowListener listener = new MyWindowListener();
frame.addWindowListener(listener);

JButton button = new JButton("关闭窗口");
button.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
    }
});