Number of Lines To Write String LeetCode solution in Java

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class Solution {
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  public int[] numberOfLines(int[] widths, String s) {
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    int sum = 0, count = 0;
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    for (int j = 0; j < s.length(); j++) {
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      int pos = s.charAt(j) - 'a';
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      sum += widths[pos];
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      if (sum > 100) {
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        j--;
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        count++;
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        sum = 0;
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        continue;
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      }
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    }
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    int[] arr = new int[2];
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    arr[0] = count + 1;
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    arr[1] = sum;
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    return arr;
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  }
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}