diamond xo substring 1 loops

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/**
 *
 * @author andika
 */
public class test {

    public static void main(String[] args) {
        int n = 10;
        int j = n - 1;
        String pattern = Pad("", n, "xo");
        for (int i = 0; i < n * 2 - 1; i++) {
            int maxstring = (2 * i) + 1;
            int padding = n - i - 1;
            if (i >= n) {
                maxstring = (2 * j) - 1;
                padding = n - j;
                j--;
            }
            String print = pattern.substring(0, maxstring);
            System.out.println(Pad(print, padding + print.length(), " "));
        }

    }

    public static String Pad(String str, Integer length, String pattern) {
        if (str.length() == length) {
            return str;
        }
        return String.format("%" + (length - str.length()) + "s", "")
                .replace(" ", pattern)
                + str;
    }
}

run online, http://rextester.com/QJAQT92776