News: 0001614756

  ARM Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life (Terry Pratchett, Jingo)

Ubuntu 26.04 LTS Moving To OpenJDK 25 By Default

([Ubuntu] 92 Minutes Ago Default OpenJDK Java)


It's not too surprising but the upcoming Ubuntu 26.04 Long Term Support release will be transitioning to OpenJDK 25 as its default Java version.

Ubuntu 24.04 LTS and newer have been using OpenJDK 21 as their default version with the default-jdk package. OpenJDK 21 is a Long Term Support release on the Java side. Released back in September though was [1]OpenJDK 25 as the newest LTS release.

Given OpenJDL 25 is the new LTS version, it's not too surprising that Ubuntu 26.04 LTS will be moving ahead to that version as the default. Just a good sign they are moving ahead though as likely an indicator of little fallout in their testing thus far. The [2]bug tracker notes at the moment of 15 packages failing to build with Java 25.

The [3]java-common package was updated this week to make OpenJDK 25 the default JDK version in Ubuntu. That is currently in the Resolute's proposed-main archive but should be working its way to main soon.

Over OpenJDK 21, OpenJDK 25 brings performance improvements, reduced memory usage, various garbage collection improvements, dropping of 32-bit x86 support, and various language enhancements. Overall a nice improvement for Java users to find as the new default beginning with Ubuntu 26.04 LTS this April.



[1] https://www.phoronix.com/news/OpenJDK-Java-25-GraalVM-25

[2] https://bugs.launchpad.net/ubuntu/+source/openjdk-25/+bug/2141711

[3] https://launchpad.net/ubuntu/+source/java-common


In a forest a fox bumps into a little rabbit, and says, "Hi,
Junior, what are you up to?"
"I'm writing a dissertation on how rabbits eat foxes," said the
rabbit.
"Come now, friend rabbit, you know that's impossible! No one
will publish such rubbish!"
"Well, follow me and I'll show you."
They both go into the rabbit's dwelling and after a while the
rabbit emerges with a satisfied expression on his face. Comes along a
wolf. "Hello, little buddy, what are we doing these days?"
"I'm writing the 2'nd chapter of my thesis, on how rabbits devour
wolves."
"Are you crazy? Where's your academic honesty?"
"Come with me and I'll show you."
As before, the rabbit comes out with a satisfied look on his face
and a diploma in his paw. Finally, the camera pans into the rabbit's cave
and, as everybody should have guessed by now, we see a mean-looking, huge
lion, sitting, picking his teeth and belching, next to some furry, bloody
remnants of the wolf and the fox.

The moral: It's not the contents of your thesis that are
important -- it's your PhD advisor that really counts.