LeetCode – Excel Sheet Column Title (Java)
Problem
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 Solution
This problem is the reverse version of Excel Sheet Column Number.
The key is n--
. The minimum in 26-bit number is mapped to 1, not 0.
public String convertToTitle(int n) { if(n <= 0){ throw new IllegalArgumentException("Input is not valid!"); } StringBuilder sb = new StringBuilder(); while(n > 0){ n--; char ch = (char) (n % 26 + 'A'); n /= 26; sb.append(ch); } sb.reverse(); return sb.toString(); } |
<pre><code> String foo = "bar"; </code></pre>
-
Srinath Shah
-
Srinath Shah
-
Ankit
-
Arjun Dubashi
-
m00dy
-
Anna Kulik