Java 26 officially released with HotSpot startup speedups and HTTP/3 client support

Oracle released Java 26 and promoted it at JavaOne 2026 in Redwood City on 2026-03-18 JST.

Java 26 includes HotSpot startup and warm-up improvements via enhanced ahead-of-time object caching.

The release adds HTTP/3 support to the HTTP Client API and removes the Applet API deprecated in Java 17.