Miscellany

    String x2y(String s)
    {
        String s2 = "";
        for(int i = 0; i < s.length(); i++)
        {
            char c = s.charAt(i);
            c -= '~';
            String s1 = String.valueOf(c);
            s2 = s2 + s1;
        }

        return s2;
    }