AoC 2017 - Day 1

public class Day1 {

    public static void main(String[] args) {
        // First problem of the day


        String capcha = " //YOUR CAPCHA CODE GOES HERE //";
        int summe = 0;
        int length = capcha.length();
        for(int i=1; i<length; i++) {
            if ((capcha.charAt(i)-'0') == (capcha.charAt(i-1)-'0')) {
                summe = summe + (capcha.charAt(i)-'0');
            }
            if ((i+1) == length) {
                if ((capcha.charAt(i)-'0') == (capcha.charAt(0)-'0'))
                summe = summe + (capcha.charAt(0)-'0');
            }
        }
        System.out.println("Capcha 1:" + summe);

        // Second problem of the day
        for(int i=0; i<length; i++) {
            int j= 0;
            if ( i + ( length/2 ) >= length )
                j = i - length/2;
            else
                j = i + length/2;
            if ((capcha.charAt(i)-'0') == (capcha.charAt(j)-'0'))
            summe = summe + (capcha.charAt(i)-'0');
        }
        System.out.println("Capcha 2:" + summe);
    }
}