formatTo

            The {@link Formatter formatter}.  Implementing classes may call
            {@link Formatter#out() formatter.out()} or {@link
            Formatter#locale() formatter.locale()} to obtain the {@link
            Appendable} or {@link Locale} used by this
            {@code formatter} respectively.

    @param flags
            The flags modify the output format.  The value is interpreted as
            a bitmask.  Any combination of the following flags may be set:
            {@link FormattableFlags#LEFT_JUSTIFY}, {@link
            FormattableFlags#UPPERCASE}, and {@link
            FormattableFlags#ALTERNATE}.  If no flags are set, the default
            formatting of the implementing class will apply.

    @param width
            The minimum number of characters to be written to the output.
            If the length of the converted value is less than the
            {@code width} then the output will be padded by
            <code>'&nbsp;&nbsp;'</code> until the total number of characters
            equals width.  The padding is at the beginning by default.  If
            the {@link FormattableFlags#LEFT_JUSTIFY} flag is set then the
            padding will be at the end.  If {@code width} is {@code -1}
            then there is no minimum.

    @param precision
            The maximum number of characters to be written to the output.
            The precision is applied before the width, thus the output will
            be truncated to {@code precision} characters even if the
            {@code width} is greater than the {@code precision}.  If
            {@code precision} is {@code -1} then there is no explicit
            limit on the number of characters.

    @throws IllegalFormatException
             If any of the parameters are invalid.  For specification of all
             possible formatting errors, see the <a
             href="../util/Formatter.html#detail">Details</a> section of the
             formatter class specification.