https://fgchen.com/wiki/index.php?action=history&feed=atom&title=SCJP_1.6%E7%89%88%E8%80%83%E9%A1%8C_188SCJP 1.6版考題 188 - 修訂歷史2026-05-30T01:04:20Z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_188&diff=1224&oldid=prevIkk：新頁面: Given a pre-generics implementation of a method: 11. public static int sum(List list){ 12. int sum = 0; 13. for(Iterator iter = list.iterator(); iter.hasNext();){ 14. int ...2013-03-30T00:27:12Z<p>新頁面: Given a pre-generics implementation of a method: 11. public static int sum(List list){ 12. int sum = 0; 13. for(Iterator iter = list.iterator(); iter.hasNext();){ 14. int ...</p>
<p><b>新頁面</b></p><div> Given a pre-generics implementation of a method:<br />
11. public static int sum(List list){<br />
12. int sum = 0;<br />
13. for(Iterator iter = list.iterator(); iter.hasNext();){<br />
14. int i = ((Integer)iter.next()).intValue();<br />
15. sum += i;<br />
16. }<br />
17. return sum;<br />
18. }<br />
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What three changes allow the class to be used with generics and avoid an unchecked warning? (Choose three.)<br />
A. Remove line 14.<br />
B. Replace line 14 with "int i = iter.next();".<br />
C. Replace line 13 with "for(int i : intList){".<br />
D. Replace line 13 with "for(Iterator iter : intList){".<br />
E. Replace the method declaration with "sum(List<int> intList)".<br />
F. Replace the method declaration with "sum(List<Integer> intList)".<br />
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<span style="font-size:medium;">解答</span><br />
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<span style="font-size: medium;">Ans: A C F </span> <br />
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<span style="font-size:medium;"> 解說:<br />
那三項改變可以使用這個類別以泛型的方式來使用，並且可以避免unchecked 的警告？<br />
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{{SCJP 1.6版考題講解}}</div>Ikk