Amazon Corretto 21, a no-cost, production-ready distribution of OpenJDK 21, is now generally available, bringing new features like Virtual Threads, DNS stale caching, Generational ZGC, and preview features like Foreign Function & Memory (FFM), Structured Concurrency, and Vector API.

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<p>This article announces the general availability of Amazon Corretto 21, a long-term support version of OpenJDK 21. It highlights key features of OpenJDK 21, including virtual threads, DNS stale caching, generational ZGC, record patterns, pattern matching for switch, sequenced collections, and a key encapsulation mechanism API.</p>
<p>The article also covers several preview features in OpenJDK 21:</p>
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<li>Foreign Function & Memory (FFM)</li>
<li>Structured Concurrency</li>
<li>Vector API</li>
<li>Scoped Values</li>
<li>Unnamed Classes and Instance Main Methods</li>
<li>String Templates</li>
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<p>Additionally, it explains that Amazon Corretto is a no-cost, multi-platform, production-ready distribution of OpenJDK, distributed by Amazon under an open-source license.</p>
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Amazon Corretto 21 is now generally available

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