public class Ex20 { public static void main(String[] args){ Fighter fighter = new Fighter(); if(fighter instanceof Thing) //fighter는 Thing에 소속되어있다.. (true)이므로 출력. System.out.println("fight instanceof Thing"); if(fighter instanceof Fightable) //fighter is instance of Fightable. System.out.println("fight instanceof Fightable"); if(fighter instanceof Movable) System.out.println("fight instanceof Mo..