A simple algorithm to remove repetitions form the string. eg. azzbyyyx -> abyx

removingRepetitions.java

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

        String originalString = "azzbyyyx";
        StringBuilder str = new StringBuilder(originalString);

        int loopCounter = 0;
        int repetitionCounter = 0;
        while (true) {
            if (loopCounter < str.length() - 1) {
                if (str.charAt(loopCounter) == str.charAt(loopCounter + 1)) {
                    str.deleteCharAt(loopCounter);
                    str.deleteCharAt(loopCounter);
                    repetitionCounter++;
                } else {
                    loopCounter++;
                }
            } else {
                if (repetitionCounter == 0) {
                    break;
                } else {
                    loopCounter = 0;
                    repetitionCounter = 0;
                }
            }
        }
      
        System.out.println(str);
    }
}