RFR: 8302590: Add String.indexOf(int ch, int fromIndex, int toIndex)

[Raffaello Giulietti]

On Fri, 24 Feb 2023 15:26:35 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> src/java.base/share/classes/java/lang/String.java line 2467:
>> 
>>> 2465:      *
>>> 2466:      * <p>As consequence of these rules, if {@code fromIndex} is greater than
>>> 2467:      * or equal to {@code toIndex}, then {@code -1} is returned.
>> 
>> Are there other examples in String where the equivalent of fromIndex > toIndex doesn't throw?
>
> I simply extrapolated the behavior from `indexOf(int ch,int fromIndex), which has a similar note:
> 
>      * There is no restriction on the value of {@code fromIndex}. If it
>      * is negative, it has the same effect as if it were zero: this entire
>      * string may be searched. If it is greater than the length of this
>      * string, it has the same effect as if it were equal to the length of
>      * this string: {@code -1} is returned.

This is the behavior of the underlying implementation as well.

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PR: https://git.openjdk.org/jdk/pull/12600