Find Unique Binary String LeetCode solution in Java

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class Solution {
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  public String findDifferentBinaryString(String[] nums) {
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    StringBuilder ans = new StringBuilder();
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    for (int i = 0; i < nums.length; i++)
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      ans.append(nums[i].charAt(i) == '0' ? '1' : '0'); // Using ternary operator
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    return ans.toString();
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  }
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}