<i18n dev> Additional Date-Time Formats

[Naoto Sato]

Hi Joe,

On 1/24/22 5:50 PM, Joe Wang wrote:
>         The 2nd and 3rd statements defined the requestedTemplate, does 
> it imply the characters listed in the snippet are the only ones that are 
> valid, in other words, can other characters under the Patterns section 
> be used? It may be helpful to elaborate on the snippet a bit more.

Those symbols represent each field, so other symbols are considered 
illegal as a template symbol. Added some explanation there.

>         Also, the range implies a valid range for a particular symbol, 
> if that's the case, y and w feel like they are unbound. If I do that 
> with ofPettern, I get ArrayIndexOutOfBoundsException.

The spec of 'year' and 'number' presentations do not have any upper 
limit number of letters, thus I added the '*' quantifier. Not exactly 
sure why AIOOBE is thrown with ofPattern(), could be a separate bug? It 
should be zero-padded or sign-padded.

> 
> For the sample code, it might be helpful to put them in a code snippet 
> and with the actual java code. If "yMMM" formats to 'Jun 2020', that 
> might require some explanation too since that would be the same as 
> ofPattern("MMM y") for the default(US) locale, or was it a typo?. (I'm 
> not familiar with the use of DTF, just printed out 
> date.format(DTF.ofPattern("yMMM" and "MMM y") :-))

Well, it is not a typo and `ofLocalizedPattern("yMMM", Locale.US)` and 
`ofPattern("MMM y", Locale.US)` both generating the same result is 
exactly what this API is aiming at. Users don't need to pay attention to 
locale specific format pattern with this API.

HTH,
Naoto