ceiling in java.java

public class Ceiling {
 public static void main(String[] args) {
 int[] arr = {1,3,7,9,14,20,26,29};
 int target = 25;
 int ans = ceiling(arr, target);
 System.out.println(ans);
 }
 static int ceiling(int[] arr, int target) {
 if (target > arr[arr.length - 1]) {
 return -1;
 }
 int start = 0;
 int end = arr.length - 1;

 while(start <= end) {
 int mid = start + (end - start) / 2;
 if (target < arr[mid]) {
 end = mid - 1;
 } else if (target > arr[mid]) {
 start = mid + 1;
 } else {
 return mid;
 }
 }
 return start;
 }
}