Number of Segments in a String LeetCode solution in Java

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class Solution {
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  public int countSegments(String s) {
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    int length = 0;
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    boolean flag = false;
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    for (Character c : s.toCharArray()) {
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      if (c == ' ' && flag) {
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        length++;
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        flag = !flag;
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      } else if (c != ' ') {
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        flag = true;
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      }
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    }
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    return flag ? length + 1 : length;
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  }
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}