Calculating Percentile Score for every value in the list

I've been searching for a way to calculate the percentile rank for every value in a given list and I've been unsuccessful thus far.

org.apache.commons.math3 gives you a way to fetch the pth percentile from a list of values but what I want is the opposite. I want to have a ranking for every value in the list. Is anyone aware of a library or a way in Apache commons math to achieve that?

For example: given a list of values {1,2,3,4,5}, I'd want to have the percentile rank for every value with the maximum percentile being 99 or 100 and the minimum being 0 or 1.

Updated code:

public class TestPercentile {

public static void main(String args[]) {
    double x[] = { 10, 11, 12, 12, 12, 12, 15, 18, 19, 20 };
    calculatePercentiles(x);
}

public static void calculatePercentiles(double[] arr) {
    for (int i = 0; i < arr.length; i++) {
        int count = 0;
        int start = i;
        if (i > 0) {
            while (i > 0 && arr[i] == arr[i - 1]) {
                count++;
                i++;
            }
        }
        double perc = ((start - 0) + (0.5 * count));
        perc = perc / (arr.length - 1);
        for (int k = 0; k < count + 1; k++)
            System.out.println("Percentile for value " + (start + k + 1)
                    + " = " + perc * 100);
    }
}}

Sample Output: 
Percentile for value 1 = 0.0
Percentile for value 2 = 11.11111111111111
Percentile for value 3 = 22.22222222222222
Percentile for value 4 = 50.0
Percentile for value 5 = 50.0
Percentile for value 6 = 50.0
Percentile for value 7 = 50.0
Percentile for value 8 = 77.77777777777779
Percentile for value 9 = 88.88888888888889
Percentile for value 10 = 100.0

Can someone let me know if this is correct and if there is a library for doing this more cleanly?

Thank you!