Question 7 Smallest Element Larger than Target

// Some code


public class Solution {
  public int smallestElementLargerThanTarget(int[] array, int target) {
    // Write your solution here
    // corner case
    if (array == null || array.length == 0){
      return -1;
    }
    
    int left = 0;
    int right = array.length - 1;
    while (left <  right - 1)
    {
      int mid = left + (right - left) / 2;
      if (array[mid] < target){
        left = mid + 1;
      }
      else if (array[mid] > target){
        right = mid;
      }
      else{
        left = mid + 1;
      }
    }
    if (array[left] > target){
      return left;
    }
    if (array[right] > target){
      return right;
    }
    return -1;
  }
}