hi i ave question about Batcher's odd-even sort i have following code

public class Batcher{
public static void batchsort(int a[],int l,int r){
  int n=r-l+1;

  for (int p=1;p<n;p+=p)
   for (int k=p;k>0;k/=2)
 for (int j=k%p;j+k<n;j+=(k+k))
   for (int i=0;i<n-j-k;i++)
     if ((j+i)/(p+p)==(j+i+k)/(p+p))
  exch(a,l+j+i,l+j+i+k);
}

public static void main(String[]args){

int a[]=new int[]{2,4,3,4,6,5,3};


batchsort(a,0,a.length-1);

 for (int i=0;i<a.length;i++){
  System.out.println(a[i]);
}

  }
 public static void    exch(int a[],int i,int j){
  int t=a[i];
a[i]=a[j];
a[j]=t;

}
}

//result is

3
3
4
4
5
2
6

what i missed ? hat is wrong?