RFR: 8197594 - String and character repeat
Xueming Shen
xueming.shen at oracle.com
Sat Feb 17 02:12:17 UTC 2018
On 2/16/18, 5:13 PM, Stuart Marks wrote:
> Let me put in an argument for handling code points:
>
>> 3. public static String repeat(final int codepoint, final int count)
>
> Most of the String and Character API handles code points on an equal
> footing with chars. I think this is important, as over time Unicode is
> continuing to add supplementary characters -- those that can't be
> represented in a Java char value. Examples abound of how such
> characters are mishandled. Therefore, I believe Java APIs should have
> full support for code points.
>
> This is a small thing, and some might consider it a rare case -- how
> often does one need to repeat something like an emoji? The issue
> however isn't that particular use case. Instead what's required is the
> ability to handle *any Unicode character* uniformly, regardless of
> whether or not it's a supplementary character. The way to do that is
> to deal with code points, so any Java API that deals with character
> data must also handle code points.
>
> If we were to add just one method:
>
>> 1. public String repeat(final int count)
>
> the workaround is to take the character, turn it into a string, and
> call the repeat() method on it. For a 'char' value, this isn't too
> bad, but I'd argue it isn't pretty either:
>
> Character.toString(charVal).repeat(n)
How about
public static repeat(int count, char... chars)?
String.repeat(100, '*');
String.repeat(100, 'x', 'y');
and it should not be too bad and kinda consistent to have
String.repeat(n, Character.toChars(0x12345));
-sherman
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