Largest Substring Between Two Equal Characters LeetCode solution in Java

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class Solution {
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  public int maxLengthBetweenEqualCharacters(String s) {
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    int[] v1 = new int[26];
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    int[] v2 = new int[26];
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    Arrays.fill(v1, -1);
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    Arrays.fill(v2, -1);
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    int ans = -1;
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    for (int i = 0; i < s.length(); ++i) {
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      int temp = s.charAt(i) - 'a';
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      if (v1[temp] == -1) {
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        v1[temp] = i;
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      } else {
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        v2[temp] = i;
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        ans = Math.max(ans, v2[temp] - v1[temp] - 1);
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      }
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    }
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    return ans;
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  }
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}