168. Excel Sheet Column Title

168. Excel Sheet Column Title

Given a positive integer, return its corresponding column title as appear in an Excel sheet.

For example:

1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB 

Java实现：

public static String convertToTitle(int n) {
    StringBuilder sb = new StringBuilder();

    while (n-- != 0){
        sb.append((char)(n%26+'A'));
        n = n/26;
    }

    return  sb.reverse().toString();
    
}