RFR: JDK-8302323 Add repeat methods to StringBuilder/StringBuffer

[Jim Laskey]

On Thu, 23 Feb 2023 16:40:32 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Add the ability to repeatedly append char and CharSequence data to StringBuilder/StringBuffer.
>
> src/java.base/share/classes/java/lang/AbstractStringBuilder.java line 1918:
> 
>> 1916:         }
>> 1917:         int valueLength = length << UTF16;
>> 1918:         if ((Integer.MAX_VALUE - this.count) / count < valueLength) {
> 
> I think you can omit this check; the call to ensureCapacityInternal will guard against the needed size.

You may be right - I looked over ensureCapacityInternal a few times, just noticing the signed shift. Thx.

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PR: https://git.openjdk.org/jdk/pull/12728