問題詳情
七、public class X{public String whatIAm() {return “I’m an X.”;}}public class Y extends X{public String whatIAm() {return “I’m a Y.”;}}public static void main(String[] args) throws IOException{ X x;BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));if (reader.readLine().equals(“Go with X”)) x = new X();else x = new Y();System.out.println(x.whatIAm());} // main
【題組】⑴請說明下列 main 程式執行情形。（10 分）
參考答案