How to create random numbers a specific number of times?

How can i create a random number a specific numbers of time?

public class Feld  {
    public static void main(String[] args) {
        double k = (int)(Math.random()*1000001);
        int n = 1000000;
        int arr[] = new int[n];
        int i = 0;
        for(i = 0;i<n;i++){
            arr[i] = i;
        }
        boolean found = false;
        i=0;
        while (i < arr.length) {
            if (arr[i] == k) {
                found = true;
                break;
            }
            i++;
        }
        if (found) {
            i++;
            System.out.println(i);
        } 
        else {
            System.out.println((arr.length + 1));
        }
    }
}

My problem is, that if i put k into a loop to create it more than one time i'll get an error at:

if (arr[i] == k)