windowClosed事件不响应

如下，windowOpened响应，但关闭主窗口时windowClosed不响应，不知道什么原因。

public class Installer extends ModuleInstall {

    @Override
    public void restored() {
        // TODO
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                WindowManager.getDefault().getMainWindow().addWindowListener(new WindowAdapter() {
                    @Override
                    public void windowOpened(WindowEvent e) {
                        System.out.println("windowOpened is called!");
                    }
                    
                    @Override
                    public void windowClosed(WindowEvent e) {
                        System.out.println("windowClosed is called!");
                    }
                });
            }
            
        });
    }
}

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