java - 如何获取字符串数组中字符的索引位置

Question

如何获取数组chars中字符c的索引位置？

public static final String[] chars = new String[]{"A","B","C","D","E","F"};
String c = "E";

// the answer is 4.

Answer 1

如果你的数组已排序，你可以使用

Arrays.binarySearch()

int answer = Arrays.binarySearch(chars, c);
return answer;

正如所提到的。否则使用 for 循环。

for (int i=0; i<chars.length; ++i) {
   if (s[i].equals(c)) {
        return i;
   }
}