Array of unique random integers in java

Array of unique random integers in java

// n : size of array

// no : elements in array will be less than no

// no>=n

private int[] uniqueIntArrray(int n,int no) {

    
    int flag = 0;
    int ar[] = new int[n];
    for (int i = 0; i < n; ) {
        flag = 0;
        int x = (int) (Math.random() * no);
        for (int j = 0; j < i; j++) {
            if (x == ar[j]) {
                flag = 1;
            }
        }
        if (flag == 1) {

        } else {
            ar[i] = x;
            i++;

        }
    }
    return ar;
}