SCJP題庫第079題

 

Given classes defined in two different files:

1. package packageA;

2. public class Message{

3.   String getText(){return "text";}

4. }

And:

1. package packageB;

2. public class XMLMessage extends packageA.Message{

3.   String getText(){return "<msg>text</msg>";}

4.   public static void main(String[] args) {

5.     System.out.println(new XMLMessage().getText());

6.  }

7. }

What is the result of executing XMLMessage.main?

A. text

B. Compilation fails.

C. <msg>text</msg>

D. An exception is thrown at runtime.

 

Ans: C

 

解說: 

此題new XMLMessage().getText()是以XMLMessage類別中的getText方法(物件是什麼型態就是那個型態的方法)