Check if an Array is Sorted (Strictly Increasing)

public class Recursion2 {
    public static boolean isSorted(int arr[], int idx) {

        if(idx == arr.length - 1) {
            return true;
        }

        if(idx >= idx+1) {
            return false;
        }

        return isSorted(arr, idx+1);

    }
    public static void main(String[] args) {
        int arr[] = {1,2,3,4,5};
        isSorted(arr, 0);
        System.out.println(isSorted(arr,0));
    }
}