Excel Sheet Column Title LeetCode solution in Java

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class Solution {
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  public String convertToTitle(int columnNumber) {
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    String ans = "";
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    while (columnNumber > 0) {
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      columnNumber--;
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      ans = String.valueOf((char) ('A' + (int) ((26 + (long) columnNumber) % 26))) + ans;
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      columnNumber /= 26;
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    }
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    return ans;
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  }
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}