public class Main { public static void main(String[] args) { // 객체 생성 KRW krw = new KRW(1500, "원"); USD usd = new USD(100.50, "달러"); EUR eur = new EUR(260.87, "유로"); JPY jpy = new JPY(1400, "엔"); // 부모 클래스를 통한 그룹화 Currency[] currencies = { krw, usd, eur, jpy }; // 모든 화폐정보를 출력 for (Currency c : currencies) { System.out.println(c.toString()); } } } /* 1. 부모 클래스 Currency를 만드시오. */ /* 2. 상속을 통해 중복 코드를 제거 후, */ /* 3. 생성자를 올바르게 수정하시오. */ /* 4. toString() 메소드를 오버라이딩 하시오. */ class KRW { private double amount; // 수량(1000) private String notation; // 표기법(원) public KRW(double amount, String notation) { this.amount = amount; this.notation = notation; } } class USD { private double amount; private String notation; public USD(double amount, String notation) { this.amount = amount; this.notation = notation; } } class EUR { private double amount; private String notation; public EUR(double amount, String notation) { this.amount = amount; this.notation = notation; } } class JPY { private double amount; private String notation; public JPY(double amount, String notation) { this.amount = amount; this.notation = notation; } }