java三层继承

class Art
{
 Art()
 {
  System.out.println("Art Constructor");
 }
}
class Drawing extends Art
{
 Drawing()
 {
  System.out.println("Draw Constructor");
 }
}
public class Cartoon extends Drawing
{
 public Cartoon()
 {
  System.out.println("Cartoon Constructor");
 }
 public static void main(String args[])
 {
  Cartoon x = new Cartoon();
 }
}