String[] card = { "2", "2", "2", "2",
"3", "3", "3", "3",
"4", "4", "4", "4",
"5", "5", "5", "5",
"6", "6", "6", "6",
"7", "7", "7", "7",
"8", "8", "8", "8",
"9", "9", "9", "9",
"10", "10", "10", "10",
"11", "11", "11", "11",
"12", "12", "12", "12",
"13", "13", "13", "13",
"14", "14", "14", "14",};
我试图将此数组转换为int数组,以便我可以在二十一点程序中使用它。任何想法?
答案 0 :(得分:1)
这很容易。只需创建一个类型为int[]
的新数组,迭代所有String
个元素,将它们转换为int
(使用Integer.parseInt(String)
),然后将该元素添加到结果数组中。 / p>
String[] cardsText = ...
// Create new int array
int[] cards = new int[cardsText.length];
// Iterate all elements
for (int i = 0; i < cardsText.length; i++) {
// Get String element
String cardText = cardsText[i];
// Parse to int
int card = Integer.parseInt(cardText);
// Add int to array
cards[i] = card;
}
或者使用 Stream API (Java 8)
String[] cardsText = ...
int[] cards = Arrays.stream(cardsText) // Stream<String>
.mapToInt(Integer::parseInt) // IntStream
.toArray(); // int[]
如果您的特定应用程序有可能,您也可以直接使用int[]
数组而不首先创建String[]
:
int[] card = { 2, 2, 2, 2,
3, 3, 3, 3,
4, 4, 4, 4,
5, 5, 5, 5,
6, 6, 6, 6,
7, 7, 7, 7,
8, 8, 8, 8,
9, 9, 9, 9,
10, 10, 10, 10,
11, 11, 11, 11,
12, 12, 12, 12,
13, 13, 13, 13,
14, 14, 14, 14 };