檢視 SCJP 1.6版考題 142 的原始碼

 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}}