Do-while or while loop to use math.random to generate a set of 20 numbers

What I'm trying to do is use a while or do-while loop to generate a set of 20 different random numbers, then display the average, number of positive numbers and number of negative numbers. I'm stumped on generating the set of numbers to use, but I think I have everything else done right.

int positive = 0;
int negative = 0;
int min = 0;
int max = 0;
int count = 0;
int total= 0;
int average;


Random r = new Random();
int number;


 while (count >= 66) {
    number = r.nextInt(150)-67;
    total += number;
    count++;
    if (number > 0) {
        positive++;
    } 
    else if (number < 0) {
        negative++;
    }
}
average = (double) total / count;
System.out.println("The number of positives is " + positive + " ");
System.out.println("The number of negatives is " + negative + " ");
System.out.printf("The average is: " + average);