getcodepage

private String[] getCodepage(String strText) {
        String numChars = "1234567890";
        String engChars = "qwertyuioplkjhgfdsazxcvbnmQWERTYUIOPLKJHGFDSAZXCVBNM";
        String rusChars = "йцукенгшщзхъэждлорпавыфячсмитьбюёЙЦУКЕНГШЩЗХЪЭЖДЛОРПАВЫФЯЧСМИТЬБЮЁ";

        String char1 = "";
        int[] rates = new int[9];

        for (int i = 0; i < strText.length(); i++) {
            // cp1251 -> cp1251
            char1 = new String(strText.substring(i, i + 1).getBytes(
                    Charset.forName("cp1251")), Charset.forName("cp1251"));
            if (engChars.contains(char1) | rusChars.contains(char1)
                    | numChars.contains(char1)) {
                rates[0]++;
            }
            // cp1252 -> cp1252
            char1 = new String(strText.substring(i, i + 1).getBytes(
                    Charset.forName("cp1252")), Charset.forName("cp1252"));
            if (engChars.contains(char1) | rusChars.contains(char1)
                    | numChars.contains(char1)) {
                rates[1]++;
            }
            // utf8 -> utf8
            char1 = new String(strText.substring(i, i + 1).getBytes(
                    Charset.forName("UTF-8")), Charset.forName("UTF-8"));
            if (engChars.contains(char1) | rusChars.contains(char1)
                    | numChars.contains(char1)) {
                rates[2]++;
            }
            // cp1251 -> cp1252
            char1 = new String(strText.substring(i, i + 1).getBytes(
                    Charset.forName("cp1251")), Charset.forName("cp1252"));
            if (engChars.contains(char1) | rusChars.contains(char1)
                    | numChars.contains(char1)) {
                rates[3]++;
            }
            // cp1252 -> cp1251
            char1 = new String(strText.substring(i, i + 1).getBytes(
                    Charset.forName("cp1252")), Charset.forName("cp1251"));
            if (engChars.contains(char1) | rusChars.contains(char1)
                    | numChars.contains(char1)) {
                rates[4]++;
            }
            // cp1251 -> utf8
            char1 = new String(strText.substring(i, i + 1).getBytes(
                    Charset.forName("cp1251")), Charset.forName("UTF-8"));
            if (engChars.contains(char1) | rusChars.contains(char1)
                    | numChars.contains(char1)) {
                rates[5]++;
            }
            // utf8 -> cp1251
            char1 = new String(strText.substring(i, i + 1).getBytes(
                    Charset.forName("UTF-8")), Charset.forName("cp1251"));
            if (engChars.contains(char1) | rusChars.contains(char1)
                    | numChars.contains(char1)) {
                rates[6]++;
            }
            // cp1252 -> utf8
            char1 = new String(strText.substring(i, i + 1).getBytes(
                    Charset.forName("cp1252")), Charset.forName("UTF-8"));
            if (engChars.contains(char1) | rusChars.contains(char1)
                    | numChars.contains(char1)) {
                rates[7]++;
            }
            // utf8 -> cp1252
            char1 = new String(strText.substring(i, i + 1).getBytes(
                    Charset.forName("UTF-8")), Charset.forName("cp1252"));
            if (engChars.contains(char1) | rusChars.contains(char1)
                    | numChars.contains(char1)) {
                rates[8]++;
            }

            int indexMax = 0;
            for (i = 0; i < 9; i++) {
                if (rates[i] > rates[indexMax]) {
                    indexMax = i;
                }
            }

            switch (indexMax) {
            case 0:
                return new String[] { "cp1251", "cp1251" };
            case 1:
                return new String[] { "cp1252", "cp1252" };
            case 2:
                return new String[] { "utf8", "utf8" };
            case 3:
                return new String[] { "cp1251", "cp1252" };
            case 4:
                return new String[] { "cp1252", "cp1251" };
            case 5:
                return new String[] { "cp1251", "utf8" };
            case 6:
                return new String[] { "utf8", "cp1251" };
            case 7:
                return new String[] { "cp1252", "utf8" };
            case 8:
                return new String[] { "utf8", "cp1252" };
            }
        }

        return new String[] { "utf8", "utf8" };
    }