HISTORY OF DEV

September 19, 2023

Java 21 LTS released

Oracle and the OpenJDK community shipped JavaA portable language running on the JVM — dominant in enterprise servers, Android, and big data. 21 on September 19, 2023 — an LTSLong-term support — a release branch maintained with security fixes for years, common in Linux and Node. release with virtual threads, sequenced collections, and pattern matching for switch.

What it was for

Java (programming language)JavaA portable language running on the JVM — dominant in enterprise servers, Android, and big data. 21's virtual threads (Project Loom) let servers handle millions of concurrent connections with simple thread-per-request code. As the current LTSLong-term support — a release branch maintained with security fixes for years, common in Linux and Node. after JavaA portable language running on the JVM — dominant in enterprise servers, Android, and big data. 17, it became the target for Spring BootA Java framework for production-ready apps — auto-configuration and embedded servers for microservices. 3.2+, GradleA build automation tool for Java, Kotlin, and Android projects using a flexible task model. 8, and enterprise JDK upgrades through 2031.

Companies

  • Sun Microsystems

Why it's here

JavaA portable language running on the JVM — dominant in enterprise servers, Android, and big data. 21 virtual threads were the biggest concurrency shift since JavaA portable language running on the JVM — dominant in enterprise servers, Android, and big data. 5 executors.

Why it mattered

Loom made blocking-style code scale without reactive programming complexity.

What it solved

Thread pools and reactive frameworks were the only ways to handle high concurrency at scale.

Media

  • Java (programming language)
    ImageJava (programming language)

    Peter Campbell, CC BY-SA 4.0, via Wikimedia Commons

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