• Ubuntu 26.04 LTS ‘Resolute Raccoon’ will useOpenJDK 25as its default Java version. • An expected change as OpenJDK 25 is a long-term support release, as Ubuntu 26.04 is, the bump brings various feature and performance improvements to developers over OpenJDK 21, the default version used in Ubuntu 24.04 LTS through 25.10. • On Ubuntu, Java isn’t installed out of the box, but when you installdefault-jdkordefault-jre(directly or indirectly as a dependency needed by other software) those meta-packages point to whichever OpenJDK version Canonical has blessed as current. • In Ubuntu 26.04 LTS, that will be OpenJDK 25. • Version 25 of OpenJDK, the open-source reference implementation of Java SE platform, improves memory efficiency, garbage collection and ahead-of-time profiling for faster startup. • A few long-gestating language features reach stable or near-stable status.

Article Summaries:

  • Ubuntu 26.04 LTS “Resolute Raccoon” will ship with OpenJDK 25 as its default Java runtime, replacing the OpenJDK 21 that has been standard since Ubuntu 24.04 LTS. The new LTS release of OpenJDK brings memory‑efficiency, garbage‑collection, and ahead‑of‑time profiling improvements, along with several long‑awaited language features. Canonical has tested the update, resolving a handful of build failures, and the packages are now in the proposed repository. The change will be available to all users on the scheduled release date of April 23 2026. Users who prefer older Java versions can still install OpenJDK 21, and a snapshot of OpenJDK 27 can be obtained from the resolute archives.
  • Ubuntu 26.04 LTS “Resolute Raccoon” will ship with OpenJDK 25 as its default Java runtime, replacing the OpenJDK 21 that has been the default in Ubuntu 24.04 LTS through 25.10. The new LTS release will provide memory‑efficiency, garbage‑collection, and ahead‑of‑time profiling improvements, along with several language features that have reached stable status. Canonical has tested the release, resolving a handful of build failures, and the packages are now in the proposed repository. OpenJDK 25 will be available to all users on the April 23, 2026 release, while older versions remain installable and a snapshot of OpenJDK 27 can be fetched from the resolute archives.

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