public class CharCountDist {
    public static void main(String[] args) {
        //charDist("ABCD","A BAD DAY");
        // charDist("ABCDEIKLMNOPQRSVWXYZ", "XEWLOBDROYBISCDYMYWZEDOBCMSOXMOKCNSPPOBOXDSKVOAEKDSYXCKBODYOXQSXOOBSXQ");
        //System.out.println(matchCount("ABBA","ABC"));
        // System.out.println(matchCount("ABBA","BAABAA") );
        //System.out.println(displacement("ABBA", 2));
        String fullString = "LCYFQPNGCYTNKVVEAKKYNKTFSWD"
                + "YRNAEERQQOCCMHSPFSHAEKRZIUVLEIWPYYAZINWAEVYDFI"
                + "ZCYDFIDZEJVLOAIRLOODDCDSRXCEOKYCALRECHHZTFPNTIW"
                + "ATJKFPMVJQLGVRSEODRRTCRCJJAEUQPNUJGEBRTIZNCPYQRZ"
                + "VLOLPRGCPCRLPIJRQDUDVBEOYRTPTYVAZRIVAEKVPAZMGRPPT"
                + "YVKPSJREPFIFKEHVGJLNVNGEHKYCNOIICNTCPCYCIPNEEUDCD"
                + "SRXCTFKYCJMRKASTYVNWAEVGDFIZCYDCPGQNFKGESKYCPNVDW"
                + "SONVTPRKYCPNVDWNAEJCYDRCYCGVESXBVIMQCYFQPNDVQDAXV"
                + "QEOFECZFPFSCPCRLPSREBWOFBYETYVPPSLCRTNXTGAHVIRPXKJ"
                + "GQTYZQLLCFUDTYVKEOUVBFCVKFPKVPRSEVECXYTRLPQLZNEHVZ"
                + "PALRECDSFKFPYTRLXAJHSPRRUCLSWIGPNUCW";
//        for (int i = 0; i < 14; i++) {
//            System.out.print("Displacement of " + i + ": ");
//            System.out.println(displacement(i, fullString));
//        }

//        for (int i = 0; i < 5; i++) {
//            System.out.println(everyXthStartingFrom(5, i, fullString));
//        }
        String partialString = "LPTENWAQHHZEYWDYZOODEAHPAPLETJPEZQOCPDEPZEZPPPELENNYEDTJSWDYQEPSPPNYCXQPDEZCPWEPTAPQLDEFPSXPEADPXPLP";
//        charDist("ACDEFHJLNOPQSTWXYZ", partialString);
    }

    //char count in a string
    public static int charCount(char C, String text) {
        char[] strArr;
        strArr = text.toCharArray();
        int count = 0;
        for (char c : strArr) {
            if (C == c) {
                count++;
            }
        }
        return count;
    }

    //handles a list of chars to compare with charCount()
    public static void charDist(String list, String text) {
        char[] strArr;
        strArr = list.toCharArray();
        for (char c : strArr) {
            System.out.println(c + " : " + charCount(c, text));
        }
    }

    //match counter for comparing two strings.
    public static int matchCount(String text1, String text2) {
        char[] strArr1;
        char[] strArr2;
        strArr1 = text1.toCharArray();
        strArr2 = text2.toCharArray();
        int count = 0;
        for (int i = 0; (i < strArr1.length) && (i < strArr2.length); i++) {
            if (strArr1[i] == strArr2[i]) {
                count++;
            }
        }
        return count;
    }

    //create displacement of a string using spaces
    public static int displacement(int disp, String text) {
        String text2 = text;
        for (int i = 0; i < disp; i++) {
            text2 = " " + text2;
        }
        return matchCount(text, text2);
    }

    //returns a generated string showing every Xth character starting from position Y in a string
    public static String everyXthStartingFrom(int keyLen, int startingPos, String text) {
        //not gonna bother using a substring here, just gcd
        char[] strArr;
        strArr = text.toCharArray();
        StringBuilder newString = new StringBuilder();
        for (int i = 0; i < text.length(); i++) {
            if ((i - startingPos) % keyLen == 0) {
                newString.append(strArr[i]);
            }
        }
        return newString.toString();
    }
}