Java Architecture Diary
Sep 18, 2023 · Fundamentals
What’s New in Java 21? Explore Updated String, Collections, and More
This article walks through the latest Java 21 additions—including enhanced String search methods, new Emoji utilities in Character, repeat() for StringBuilder and StringBuffer, updated Charset factories, named regex groups, SequencedCollection interfaces, localized DateTimeFormatter patterns, extended Math and BigInteger operations, and improved Thread and Future APIs—providing code examples and usage guidance.
APICollectionsDateTime
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