public class TestDog {
   public static void main(String[] args){
       Dog d1 = new Dog("Mimi", 2, "Baby");
       System.out.print("name is " + d1.getName() 
+ "   age is " + d1.getAge());
       System.out.println("  nickName is "+ d1.getNickName());
       d1.run();
       
       Animal a1 = new Animal("Mimi", 2);
       System.out.println("name is " + a1.getName() 
+ "    age is " + a1.getAge());
       a1.run();       
   }
}