RFR (JDK11) 8137326: Methods for comparing CharSequence, StringBuilder, and StringBuffer (original) (raw)

Xueming Shen xueming.shen at oracle.com
Fri Jan 26 22:12:57 UTC 2018

java.time.format.DateTimeParseContext.subSequenceEquals

On 1/26/18, 1:48 PM, huizhe wang wrote:

Thanks Stephen for the note.

I downloaded the api [1], but don't seem to see a class "DateTimeParseContext". Do you have a pointer to the current webrev? What does it do, and what would be the implication with regards to the CharSequence compare method? [1] https://jcp.org/en/jsr/detail?id=310 Best, Joe On 1/26/2018 7:01 AM, Stephen Colebourne wrote: Just to note that JSR-310 had to add a CharSequence comparison method. Not the same as this one, but a data point, and perhaps a target to become public in a future webrev. See DateTimeParseContext.subSequenceEquals().

Stephen

On 26 January 2018 at 03:00, Joe Wang <huizhe.wang at oracle.com> wrote: Hi, Adding methods for comparing CharSequence, StringBuilder, and StringBuffer. The Comparable implementations for StringBuilder/Buffer are similar to that of String, allowing comparison operations between two StringBuilders/Buffers, e.g. aStringBuilder.compareTo(anotherStringBuilder). For CharSequence however, refer to the comments in JIRA, a static method 'compare' is added instead of implementing the Comparable interface. This 'compare' method may take CharSequence implementations such as String, StringBuilder and StringBuffer, making it possible to perform comparison among them. The previous example for example is equivalent to CharSequence.compare(aStringBuilder, anotherStringBuilder). Tests for java.base have been independent from each other. The new tests are therefore created to have no dependency on each other or sharing any code. JBS: https://bugs.openjdk.java.net/browse/JDK-8137326 webrev: http://cr.openjdk.java.net/~joehw/jdk11/8137326/webrev/ Thanks, Joe

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