Ikk：新頁面: 10. public class Hello{ 11. String title; 12. int value; 13. public Hello(){ 14. title += " World"; 15. } 16. public Hello(int value){ 17. this.value = value;...

2013-03-30T08:00:32Z

新頁面: 10. public class Hello{ 11. String title; 12. int value; 13. public Hello(){ 14. title += " World"; 15. } 16. public Hello(int value){ 17. this.value = value;...

新頁面

10. public class Hello{
11. String title;
12. int value;
13. public Hello(){
14. title += " World";
15. }
16. public Hello(int value){
17. this.value = value;
18. title = "Hello";
19. Hello();
20. }
21. }
and:
30. Hello c = new Hello(5);
31. System.out.print(c.title);

What is the result?
A. Hello
B. Hello World
C. Compilation fails.
D. Hello World 5
E. The code runs with no output.
F. 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:
對本身建構子的呼叫寫法為this(), 另外，
若有本身建構子的呼叫或對父類別建構子的呼叫，這二種呼叫必須出現在首行
</span>
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{{SCJP 1.6版考題講解}}

SCJP 1.6版考題 035 - 修訂歷史

Ikk：新頁面: 10. public class Hello{ 11. String title; 12. int value; 13. public Hello(){ 14. title += " World"; 15. } 16. public Hello(int value){ 17. this.value = value;...