i am trying to solve following recurence program

http://en.wikipedia.org/wiki/Hyper_operator

here is my code i know it has mistakes but i have done what i could

public class hyper{

public static int Hyper(int a,int b,int n){
int t=0;
     if ( n==0)

 return b+1;
   if ((n==1) &&(b==0))
   return a;
 if ((n==2) && (b==0))
 return 0;
  if ((n>=3) && (b==0))
 return 1;
 t=Hyper(a,b-1,n);
 return Hyper (a,t,n-1);




}
public static void main(String[]args){

int n=3;
 int a=5;
int b=7;
 System.out.println(Hyper(a,b,n));









}

} 

please help