https://fgchen.com/wiki/index.php?action=history&feed=atom&title=SCJP_1.6%E7%89%88%E8%80%83%E9%A1%8C_075SCJP 1.6版考題 075 - 修訂歷史2026-04-13T12:57:07Z本 Wiki 上此頁面的修訂歷史MediaWiki 1.29.0https://fgchen.com/wiki/index.php?title=SCJP_1.6%E7%89%88%E8%80%83%E9%A1%8C_075&diff=1353&oldid=prevIkk：新頁面: 11. public interface A{ public void m1(); } 13. class B implements A{ } 14. class C implements A{ public void m1(){}} 15. class D implements A{ public void m1(int x){}} 16. abstra...2013-03-30T06:36:27Z<p>新頁面: 11. public interface A{ public void m1(); } 13. class B implements A{ } 14. class C implements A{ public void m1(){}} 15. class D implements A{ public void m1(int x){}} 16. abstra...</p>
<p><b>新頁面</b></p><div> 11. public interface A{ public void m1(); }<br />
13. class B implements A{ }<br />
14. class C implements A{ public void m1(){}}<br />
15. class D implements A{ public void m1(int x){}}<br />
16. abstract class E implements A {}<br />
17. abstract class F implements A { public void m1(){} }<br />
18. abstract class G implements A { public void m1(int x){} }<br />
<br />
<br />
What is the result?<br />
A. Compilation succeeds.<br />
B. Exactly one class does NOT compile.<br />
C. Exactly two classes do NOT compile.<br />
D. Exactly four classes do NOT compile.<br />
E. Exactly three classes do NOT compile.<br />
<br />
<div class="toccolours mw-collapsible mw-collapsed"><br />
<span style="font-size:medium;">解答</span><br />
<br />
----<br />
<div class="mw-collapsible-content"><br />
<span style="font-size: medium;">Ans: C </span><br />
<br />
<span style="font-size:medium;"> 解說:<br />
此題答案是剛好二個類別不會編繹<br />
13行 B類別錯，既然宣告實作介面A，就要提供介面A中的m1()方法<br />
15行 D類別錯，提供的方法不是用來提供m1()方法的實作<br />
說明：類別實作介面會繼承介面的抽象方法1．類別中有抽象的方法，該類別必須為抽象<br />
2．類別若不為抽象，則必須對繼承的抽象方法提供實作<br />
<br />
</span> <br />
</div></div><br />
{{SCJP 1.6版考題講解}}</div>Ikk