題組內容

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

⑵請以此程式解釋動態繫結（dynamic binding）。（10 分）

詳解 (共 1 筆)

蔡均易
蔡均易
詳解 #3510986
2019/07/27
執行 x.whatIAm( ) 時，會根...
(共 87 字，隱藏中）
前往觀看