Sum odd elements of a list

Java Version
//// P0: Compute the sum of the odd elements of a list.
  
class Cons extends Object {
	int  car;
	Cons cdr;

	Cons(int car, Cons cdr) {
		this.car = car;
		this.cdr = cdr;
		}
		  
  public static boolean isNull(Object x) { return x == null; }
  public int  car() { return this.car; }
  public Cons cdr() { return this.cdr; }
  }
   
class Puzzler_0 extends Object {
	public static int sum_odd(Cons es) {
		int sum = 0;
		while(!Cons.isNull(es)) {
			int e = es.car();
			if (e%2 == 1) sum = sum + e;
			es = es.cdr();
			}
		return sum;
  }
}

Lisp Version
;;; 0: Compute the sum of the odd elements of a list

(defvar L '(2 9 3 8 4 7))

(defun main ()
  (print (sum-odd '(2 9 3 8 4 7))))

(defun sum-odd (elements)
  (let ((sum 0))
    (dolist (e elements)
      (if (oddp e) (setq sum (+ sum e))))
    (sum-odd sum)))