Ninja - spot the errors

public class Ninja {

/* Assume the Enemy class exists and has the required methods. */

     private Ninja(Enemy enemy, String alliegence) {
          this.alliegence = alliegence;
          this.enemy = enemy;
     }

     void sabotage() {
          infiltrate( );
          setOnFire(enemy.getLocation());
     }


String infiltrate(String who) {
     }

     {
          Nagato nagato = Ninja("Nagato", "Nobunaga");
          Momochi momochi = Ninja("Momochi", new Enemy());
     }
}