实例化windowListener接口是否有效？

Question

WindowListener是一个接口吗？但是，实例化如何才是有效的呢？我们不能实例化接口，对吗？

WindowListener l1=new WindowListener() {

        public void windowOpened(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        public void windowIconified(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        public void windowDeiconified(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        public void windowDeactivated(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        public void windowClosing(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        public void windowClosed(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        public void windowActivated(WindowEvent e) {
            // TODO Auto-generated method stub

        }
    };

Answer 1

这将创建一个实现WindowListener接口的新匿名类。