Check if One String Swap Can Make Strings Equal LeetCode solution in Java

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class Solution {
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  public boolean areAlmostEqual(String s1, String s2) {
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    int[] s1Array = new int[26];
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    int[] s2Array = new int[26];
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    int counter = 0;
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    for (int i = 0; i < s1.length(); i++) {
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      char s = s1.charAt(i);
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      char ss = s2.charAt(i);
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      if (s != ss) counter++;
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      if (counter > 2) return false;
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      s1Array[s - 'a']++;
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      s2Array[ss - 'a']++;
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    }
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    return Arrays.equals(s1Array, s2Array);
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  }
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}