java如何将这个匿名类转换为命名的内部类

Question

我找不到类似的例子。我想将这个匿名Java类转换为命名的内部类

public class AnonymousInnerClassExercise{

    public class AnonymousInnerClassExercise{
      public AnonymousInnerClassExercise() {
          Frame frame = new Frame();
          frame.addWindowListener(new WindowAdapter() {
              public void windowClosing(WindowEvent e) {
                  System.exit(0);
              }
          });
      }
    }
}