RFR: JDK-8197594: String#repeat

Stuart Marks stuart.marks at oracle.com
Wed Feb 28 22:21:14 UTC 2018

Hi Jim,

Implementation looks good. I'd suggest a couple small editorial changes to the spec:

2966     /**
2967      * Returns a string whose value is the concatenation of this
2968      * string repeated {@code count} times.
2969      * <p>
2970      * If count or length is zero then the empty string is returned.

I went looking for a 'length' parameter, until I realized it means the length of 
*this string*. So maybe clarify that. (And also line 2977.)

2971      * <p>
2972      * This method may be used to create space padding for
2973      * formatting text or zero padding for formatting numbers.

I don't think having this text is necessary, but if you want it, I'd suggest 
putting it into an @apiNote.

2974      * @param   count number of times to repeat
2975      * @return  A string composed of this string repeated
2976      *          {@code count} times or the empty string if count
2977      *          or length is zero.



On 2/28/18 8:31 AM, Jim Laskey wrote:
> Introduction of a new instance method String::repeat to allow an efficient and concise approach for generating repeated character sequences as strings.
> Performance information in JBS.
> Thank you.
> Cheers,
> — Jim
> JBS: https://bugs.openjdk.java.net/browse/JDK-8197594 <https://bugs.openjdk.java.net/browse/JDK-8197594>
> CSR: https://bugs.openjdk.java.net/browse/JDK-8198296
>   <http://cr.openjdk.java.net/~jlaskey/8197594/String.html>
> Webrev: http://cr.openjdk.java.net/~jlaskey/8197594/webrev-02/index.html <http://cr.openjdk.java.net/~jlaskey/8197594/webrev-02/index.html>
> JavaDoc: http://cr.openjdk.java.net/~jlaskey/8197594/String.html <http://cr.openjdk.java.net/~jlaskey/8197594/String.html>

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