Ikk：新頁面: Assuming that the serializeBanana() and the deserializeBanana() methods will correctly use Java serialization and given: 13. import java.io.*; 14. class Food implements Serializabl...

2013-03-30T03:12:12Z

新頁面: Assuming that the serializeBanana() and the deserializeBanana() methods will correctly use Java serialization and given: 13. import java.io.*; 14. class Food implements Serializabl...

新頁面

Assuming that the serializeBanana() and the deserializeBanana()
methods will correctly use Java serialization and given:
13. import java.io.*;
14. class Food implements Serializable{int good = 3;}
15. class Fruit extends Food{int juice = 5;}
16. public class Banana extends Fruit{
17. int yellow = 4;
18. public static void main(String[] args) {
19. Banana b = new Banana(); Banana b2 = new Banana();
20. b.serializeBanana(b); //assume correct serialization
21. b2 = b.deserializeBanana(); //assume correct
22. System.out.println("restore " + b2.yellow + b2.juice + b2.good);
24. }
25. //more Banana methods go here
50. }

What is the result?
A. restore 400
B. restore 403
C. restore 453
D. Compilation fails.
E. An exception is thrown at runtime.

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<span style="font-size:medium;">解答</span>

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<span style="font-size: medium;">Ans: C </span>

<span style="font-size:medium;"> 解說:
物件的串流操作，serialize和deserialize可看做是將物件放入或取出一個磁帶

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{{SCJP 1.6版考題講解}}

SCJP 1.6版考題 142 - 修訂歷史

Ikk：新頁面: Assuming that the serializeBanana() and the deserializeBanana() methods will correctly use Java serialization and given: 13. import java.io.*; 14. class Food implements Serializabl...