static String quote(char c) {

        StringBuilder b = new StringBuilder();
        b.append('\'');
        if (c == '\'')
            b.append('\\').append('\'');
        else if (c == '\\')
            b.append('\\').append('\\');
        else if (c == '\n')
            b.append('\\').append('n');
        else if (c == '\r')
            b.append('\\').append('r');
        else
            b.append(c);
        b.append('\'');
        return b.toString();
    }
static String quote(char c) {

        StringBuilder b = new StringBuilder();
        b.append('\'');
        if (c == '\'')
            b.append('\\').append('\'');
        else if (c == '\\')
            b.append('\\').append('\\');
        else if (c == '\n')
            b.append('\\').append('n');
        else if (c == '\r')
            b.append('\\').append('r');
        else
            b.append(c);
        b.append('\'');
        return b.toString();
    }
static String quote ( char c ) { StringBuilder b = new StringBuilder ( ) ; b . append ( ' ' ) ; if ( c == ' ' ) b . append ( ' ' ) . append ( ' ' ) ; else if ( c == ' ' ) b . append ( ' ' ) . append ( ' ' ) ; else if ( c == ' ' ) b . append ( ' ' ) . append ( ' ' ) ; else if ( c == ' ' ) b . append ( ' ' ) . append ( ' ' ) ; else b . append ( c ) ; b . append ( ' ' ) ; return b . toString ( ) ; }
Single quote and escape a character
Single quote and escape a character