Coin-Flip Sort Java Code

package coinFlipSort;

public class coinFlipSort {
    public static void main ( String[] args ){


        int flips = 1000;
        String s = "";
        int[] arr  = new int [flips+2];
        int[] arr2 = new int [flips+2];

        for (int i = 0; i<flips; i++){
            s = s + Integer.toString(((int) Math.ceil(((Math.random()*10)%2)-1))).replace("0", "H").replace("1", "T");
        }

        System.out.println(s);

        //Heads

        for (int i = flips; i>0; i--){

            String s2 = "";

            for (int x = 1; x <= i; x++){
                s2 = s2 + "H";
            }

            int count = 0;

            while (s.indexOf(s2)>=0){

                count++;
                s=s.replaceFirst(s2, Integer.toString(i));

            }

            arr[i]=count;

        }

        //Tails

        for (int i = flips; i>0; i--){

            String s2 = "";

            for (int x = 1; x <= i; x++){
                s2 = s2 + "T";
            }

            int count = 0;

            while (s.indexOf(s2)>=0){

                count++;
                s=s.replaceFirst(s2, Integer.toString(i));

            }

            arr2[i]=count;

        }

        //Print

        System.out.println("-----------------------------------------");
        System.out.println("#\t|\tHeads\t|\tTails\t|");
        System.out.println("-----------------------------------------");

        for (int i = flips; i>0; i--){
            if(arr[i]>0){
                System.out.println(Integer.toString(i) + "\t|\t" + Integer.toString(arr[i]) + "\t|\t" + Integer.toString(arr2[i]) + "\t|");
            }
        }

    }
}