Add Two Integers LeetCode solution in Java

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class Solution {
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  public int sum(int num1, int num2) {
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    int l = -200, r = 200;
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    while (l < r) {
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      int mid = (l + r) >> 1;
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      if (mid == num1 + num2) {
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        return mid;
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      }
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      if (mid < num1 + num2) l = mid + 1;
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      if (mid > num1 + num2) r = mid - 1;
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    }
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    return l;
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  }
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}