import java.util.Arrays; public class Main { public static void main(String[] args) { int[] arr={1,2,3,4,5,6,7}; int index1=Binary(arr, 12, 0, arr.length - 1); int index2=Binary(arr, 66, 0, arr.length - 1); System.out.println(index1); System.out.println(index2); } public static int Binary(int[] arr, int key, int low, int high) { while (low <= high) { int mid=(low+high)/2; if(arr[mid]>key){ high = mid - 1; } else if(arr[mid] < key){ low = mid + 1; } else{ return mid; } } return -1; } }