Recursividad Aninada

public class Vector{
public int multiplicar(int vec[],int tan) {
   if ( tan==0){
     return (vec[0]);
   }
return (vec[tan]*multiplicar(vec,tan-1));
}
public static void main(String [] args){
Vector e= new Vector();
int [] arre = (2,3,4,5);
System.out.println(e.multiplicar(arre,arre.length-1));
}
}