Anonymous Inner Class (匿名内部类)

匿名类本身就是通过继承类或者接口来实现的。但是不能再显式的extends 或者implements了。
举个例子：
JFrame frame = new JFrame();
我们为frame添加窗口事件可以采用如下两种方式：

Java code

<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ --> frame.addWindowListener(new WindowListener() { public void windowOpened(WindowEvent e) { throw new UnsupportedOperationException("Not supported yet."); } public void windowClosing(WindowEvent e) { throw new UnsupportedOperationException("Not supported yet."); } public void windowClosed(WindowEvent e) { throw new UnsupportedOperationException("Not supported yet."); } public void windowIconified(WindowEvent e) { throw new UnsupportedOperationException("Not supported yet."); } public void windowDeiconified(WindowEvent e) { throw new UnsupportedOperationException("Not supported yet."); } public void windowActivated(WindowEvent e) { throw new UnsupportedOperationException("Not supported yet."); } public void windowDeactivated(WindowEvent e) { throw new UnsupportedOperationException("Not supported yet."); } });

这个匿名类就是实现了接口WindowListener
或者：

Java code

<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ --> frame.addWindowListener(new WindowAdapter() {});

上面这个匿名类就是继承了ＷｉｎｄｏｗＡｄａｐｔｅｒ这个抽象类。