example of finding matches in a string

Main.java

public class Main {


    public static void main(String[] args) {
        String data = "CCAAAAATTT!";
        char maxLetter = data.charAt(0);
        int maxCount = 1;
        for (int i = 0; i < data.length() -1; i++) {
            int currentCount = 1;
            char letter = data.charAt(i);
            while (letter == data.charAt(i + 1)) {
                currentCount++;
                i++;
               // System.out.println("found match: " + letter + " = " + currentCount);
                if (currentCount > maxCount) {
                    maxCount = currentCount;
                    maxLetter = data.charAt(i);
                }
                System.out.println(i);
            }
           // System.out.println("max count is "  + maxCount);
           // System.out.println("max letter is " + maxLetter);
        }
        System.out.println(maxLetter + " " + maxCount);

    }
}