Optional used as method argument?

[Sean Mullan]

On 10/2/15 9:27 AM, Wang Weijun wrote:
>
>> 在 2015年10月2日，下午8:49，Roger Riggs <Roger.Riggs at oracle.com> 写道：
>>
>> +1
>>
>> The "no such value" makes me curious about the context.
>> The @param tag really should be saying something about the parameter.
>
> In fact, I'm working on a method which is similar to
>
>    /*
>     * Generates some random bytes.
>     *
>     * @param n requested random value in bytes.
>     * @param extraEntropy optional entropy caller can provide, null if none.
>     */
>    byte[] getRandom(int n, byte[] extraEntropy)
>
> Most caller won't be able to provide extra entropy, but if one does have a dedicated device which can generate fresh entropy, it is welcome.

Alternatively, you could just add an overloaded method, and not allow a 
null value for extraEntropy:

byte[] getRandom(int n)
byte[] getRandom(int n, byte[] extraEntropy)

--Sean