Ikk：新頁面: 1. class A{ 2. public String doit(int x, int y){ 3. return "a"; 4. } 5. 6. public String doit(int... vals){ 7. return "b"; 8. } 9. } Given: 25. A a = new A(); ...

2013-03-30T07:45:18Z

新頁面: 1. class A{ 2. public String doit(int x, int y){ 3. return "a"; 4. } 5. 6. public String doit(int... vals){ 7. return "b"; 8. } 9. } Given: 25. A a = new A(); ...

新頁面

1. class A{
2. public String doit(int x, int y){
3. return "a";
4. }
5.
6. public String doit(int... vals){
7. return "b";
8. }
9. }
Given:
25. A a = new A();
26. System.out.println(a.doit(4, 5));

What is the result?

A. Line 26 prints "a" to System.out.
B. Line 26 prints "b" to System.out.
C. An exception is thrown at runtime.
D. Compilation of class A will fail due to an error in line 6.

<div class="toccolours mw-collapsible mw-collapsed">
<span style="font-size:medium;">解答</span>

----
<div class="mw-collapsible-content">
<span style="font-size: medium;">Ans: A </span>

<span style="font-size:medium;"> 解說:
方法呼叫代入二個整數，方法是以“明確”的二個整數參數宣告的方法為優先選取。

若要輸出b(選擇第6行)，則建議的程式可改為
class A{
public String doit(int x, int y, int c){
return "a";
}

public String doit(int... vals){
return "b";
}
public static void main(String[] args){
A a = new A();
System.out.println(a.doit(4, 5));
}
}
</span>
</div></div>
{{SCJP 1.6版考題講解}}

SCJP 1.6版考題 042 - 修訂歷史

Ikk：新頁面: 1. class A{ 2. public String doit(int x, int y){ 3. return "a"; 4. } 5. 6. public String doit(int... vals){ 7. return "b"; 8. } 9. } Given: 25. A a = new A(); ...