[OCAJP]二維字串陣列

Given the code fragment:

String shirts[][] = new String[2][2];
shirts[0][0] = "red";
shirts[0][1] = "blue";
shirts[1][0] = "small";
shirts[1][1] = "medium";

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:?

for (int index = 1; index < 2; index++) {
    for (int idx = 1; idx < 2; idx++) {
        System.out.print(shirts[index][idx] + ":");
    }
}

for (int index = 1; index < 2; index++) {

for (int idx = 1; idx < 2; idx++) {

System.out.print(shirts[index][idx] + ":");

}

for (int index = 0; index < 2; index++) {
    for (int idx = 0; idx < index; idx++) {
        System.out.print(shirts[index][idx] + ":");
    }
}

for (int index = 0; index < 2; index++) {

for (int idx = 0; idx < index; idx++) {

System.out.print(shirts[index][idx] + ":");

}

for (String sizes : shirts) {
    for (String s : sizes) {
        System.out.print(s + ":");
    }
}

for (String sizes : shirts) {

for (String s : sizes) {

System.out.print(s + ":");

}

for (int index = 0; index < 2;) {
    for (int idx = 0; idx < 2;) {
        System.out.print(shirts[index][idx] + ":");
        idx++;
    }
    index++;
}

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。

MagicLen

[OCAJP]二維字串陣列

題解

關於作者

Magic Len

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