This program should not compile:

interface I {
  void zoo(Y y, String s);
}

class Y {
        void zoo(String s) {
                System.out.println("Y.zoo(String)");
        }
        void zoo(Y y, String s) {
                System.out.println("Y.zoo(Y, String)");
        }
}


public class X {
    public static void main(String[] args) {
            I i = Y::zoo;
            i.zoo(null, null);
        }
}