Given the code fragment:
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String shirts[][] = new String[2][2]; shirts[0][0] = "red"; shirts[0][1] = "blue"; shirts[1][0] = "small"; shirts[1][1] = "medium"; |
Which code fragment prints red:blue:small:medium:?
A.
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for (int index = 1; index < 2; index++) { for (int idx = 1; idx < 2; idx++) { System.out.print(shirts[index][idx] + ":"); } } |
B.
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for (int index = 0; index < 2; index++) { for (int idx = 0; idx < index; idx++) { System.out.print(shirts[index][idx] + ":"); } } |
C.
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for (String sizes : shirts) { for (String s : sizes) { System.out.print(s + ":"); } } |
D.
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for (int index = 0; index < 2;) { for (int idx = 0; idx < 2;) { System.out.print(shirts[index][idx] + ":"); idx++; } index++; } |
題解
選項A,由於index和idx都是從1開始,所以只會輸出shirts[1][1]的內容,也就是「medium」字串還有「:」。
選項B,會輸出「small:」。
選項C,shirt的型態應為字串陣列「String[]」。
選項D,正確答案。