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";
Which code fragment prints red:blue:small:medium:?
A.
for (int index = 1; index < 2; index++) {
for (int idx = 1; idx < 2; idx++) {
System.out.print(shirts[index][idx] + ":");
}
}
B.
for (int index = 0; index < 2; index++) {
for (int idx = 0; idx < index; idx++) {
System.out.print(shirts[index][idx] + ":");
}
}
C.
for (String sizes : shirts) {
for (String s : sizes) {
System.out.print(s + ":");
}
}
D.
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。