my problem related to overriding

[Thakur Sachin Singh]

in kaithy seirra & bert bates book there is code which is below

  public class TestAnimals
{
  public static void main(String[] args )
  {
    Animal a=new Animal();
    Animal b=new Horse();
    a.eat();
    b.eat();

  }
}
class Animal
{
  public void eat()
  {
    System.out.println("Generic Animal eating Generically");
  }
}

class Horse extends Animal
{
  private void eat()
  {
     System.out.println("Horse eating");

  }
}  

[Thakur Sachin Singh]

they told that there are meltdown at runtime but when i compile this program then compiler error generated...

something like this.........

*************************************************************************

eat() in Horse cannot override eat() in Animal; attempting to assign weaker access privileges; was public
private void eat()
^
1 error

Tool completed with exit code 1
**************************************************************************

[Thakur Sachin Singh]

give me some suggestion what problem there.............this is the code of chapter2 page no 101 in scjp 5 by kaithy seirra & bert bates.

[Thakur Sachin Singh]

book use jdk 1.5

i compile this program from jdk1.6 update 17...........

[Pramod P Deore]

First read carefully rules of method overriding. Read what compiler says-

eat() in Horse cannot override eat() in Animal; attempting to assign weaker access privileges; was public
private void eat()

[Thakur Sachin Singh]

yes i know all the rules of overriding and i also understand this error...but i want to know that...why these differences arise between book and real implementation in jdk 1.6.

[Pramod P Deore]

I don't have Book right now, but I am sure It is not runtime error it gives you a compile time error.

[Thakur Sachin Singh]

yes there is compile time error....i have ebook of scjp6...if you want then i send you that book on your id...after that you told me what the problem here..........

[Thakur Sachin Singh]

any one give suggestion...i am confused.

[Frits Walraven]

Hi Thakur,

The book states:

If this code compiled (which it doesn't), the following would fail at runtime:

   
Animal b = new Horse(); // Animal ref, but a Horse
                // object , so far so good
b.eat(); // Meltdown at runtime! 
 

Regards,
Frits

[Thakur Sachin Singh]

ok thanks for reply.