Joe Darcy
@jddarcy.bsky.social
OpenJDK developer at Oracle, floating-point fancier, marathoner, record-setting fast walker, episodic photographer. Views expressed may or may not be held by any person or org.
The IEEE 754 floating-point arithmetic / kaiju cross-over movie we've all been waiting for _Godzilla Minus Zero_ (also stylized as "Godzilla -0.0") is slated for release in late 2026!
en.wikipedia.org/wiki/Godzill...
"Godzilla NaN" next expected sequel for an unordered challenge.
en.wikipedia.org/wiki/Godzill...
"Godzilla NaN" next expected sequel for an unordered challenge.
Godzilla Minus Zero - Wikipedia
en.wikipedia.org
November 6, 2025 at 2:52 AM
The IEEE 754 floating-point arithmetic / kaiju cross-over movie we've all been waiting for _Godzilla Minus Zero_ (also stylized as "Godzilla -0.0") is slated for release in late 2026!
en.wikipedia.org/wiki/Godzill...
"Godzilla NaN" next expected sequel for an unordered challenge.
en.wikipedia.org/wiki/Godzill...
"Godzilla NaN" next expected sequel for an unordered challenge.
Now just over five weeks until the Dec. 4, 2025 start of JDK 26
rampdown 1. No time like the present to get any remaining CSRs filed.
mail.openjdk.org/pipermail/jd...
rampdown 1. No time like the present to get any remaining CSRs filed.
mail.openjdk.org/pipermail/jd...
mail.openjdk.org
October 29, 2025 at 10:53 PM
Now just over five weeks until the Dec. 4, 2025 start of JDK 26
rampdown 1. No time like the present to get any remaining CSRs filed.
mail.openjdk.org/pipermail/jd...
rampdown 1. No time like the present to get any remaining CSRs filed.
mail.openjdk.org/pipermail/jd...
Reposted by Joe Darcy
For those of us in the bay area, with one of the first rain storms of the season, a reminder to check the local storm drains to see if they are clear of debris blocking their flow.
December 13, 2024 at 1:51 AM
For those of us in the bay area, with one of the first rain storms of the season, a reminder to check the local storm drains to see if they are clear of debris blocking their flow.
Reposted by Joe Darcy
I'm seeing lots of AI generated Java Dukes appearing with a mouth, feet, ears and more. Tip: when using AI, upload this “Duke Specification” image, prompt AI to follow as a reference. I think you'll find the resulting image is much better. Ex: "draw duke on a skateboard referencing this spec image"
October 10, 2025 at 4:21 PM
I'm seeing lots of AI generated Java Dukes appearing with a mouth, feet, ears and more. Tip: when using AI, upload this “Duke Specification” image, prompt AI to follow as a reference. I think you'll find the resulting image is much better. Ex: "draw duke on a skateboard referencing this spec image"
Video now available for my 2025 #JVMLS talk "Paths to support additional numeric types on the Java platform": youtu.be/xCdJb_zI5us
Paths to Support Additional Numeric Types on the Java Platform #JVMLS
YouTube video by Java
youtu.be
September 21, 2025 at 4:51 PM
Video now available for my 2025 #JVMLS talk "Paths to support additional numeric types on the Java platform": youtu.be/xCdJb_zI5us
Slides for my #JVMLS talk on "Paths to support additional numeric types on the Java platform":
github.com/jddarcy/Spea...
github.com/jddarcy/Spea...
github.com
August 5, 2025 at 6:17 PM
Slides for my #JVMLS talk on "Paths to support additional numeric types on the Java platform":
github.com/jddarcy/Spea...
github.com/jddarcy/Spea...
JSR 269 up for maintenance review (MR) for the changes being made in Java SE 25: jcp.org/aboutJava/co...
#OpenJDK
#OpenJDK
The Java Community Process(SM) Program - communityprocess - maintenance
jcp.org
July 15, 2025 at 7:22 PM
JSR 269 up for maintenance review (MR) for the changes being made in Java SE 25: jcp.org/aboutJava/co...
#OpenJDK
#OpenJDK
Just one month to go until my #JVMLS talk on "New Numeric Types in Java": openjdk.org/projects/mlv...
openjdk.org
July 5, 2025 at 7:04 PM
Just one month to go until my #JVMLS talk on "New Numeric Types in Java": openjdk.org/projects/mlv...
Happy 𝜏 day to all who celebrate.
June 28, 2025 at 4:32 PM
Happy 𝜏 day to all who celebrate.
Watching through Andor season two and imagining a future companion book "The Andor Guide to Business" with chapters like:
"Effective Meetings" by Major Lio Partagaz, ISB
"Get the people you need when you need them" by Luthen Rael
"Effective Meetings" by Major Lio Partagaz, ISB
"Get the people you need when you need them" by Luthen Rael
May 8, 2025 at 1:04 AM
Watching through Andor season two and imagining a future companion book "The Andor Guide to Business" with chapters like:
"Effective Meetings" by Major Lio Partagaz, ISB
"Get the people you need when you need them" by Luthen Rael
"Effective Meetings" by Major Lio Partagaz, ISB
"Get the people you need when you need them" by Luthen Rael
New experience today at the grocery store, getting carded when trying to buy _non-alcoholic_ beer. The situation was resolved _without_ the need to show id.
April 25, 2025 at 12:20 AM
New experience today at the grocery store, getting carded when trying to buy _non-alcoholic_ beer. The situation was resolved _without_ the need to show id.
No reason to delay; now is an opportune time to get CSRs in for JDK 25 changes well ahead of the anticipated JDK 25 rampdown 1 start: mail.openjdk.org/pipermail/jd... #OpenJDK #JDK25
Reminder: file JDK 25 CSRs well ahead of rampdown 1 start
mail.openjdk.org
April 3, 2025 at 8:00 PM
No reason to delay; now is an opportune time to get CSRs in for JDK 25 changes well ahead of the anticipated JDK 25 rampdown 1 start: mail.openjdk.org/pipermail/jd... #OpenJDK #JDK25
Highlight from the first day of Yosemite firefall 2025.
February 14, 2025 at 12:10 AM
Highlight from the first day of Yosemite firefall 2025.
@julialang.org , OpenLibm question: are the algorithmic differences between OpenLibm and FDLIBM 5.3 documented anywhere? There are various source differences, but I didn't see any discussion in the openlibm git repo. TIA
February 5, 2025 at 11:24 PM
@julialang.org , OpenLibm question: are the algorithmic differences between OpenLibm and FDLIBM 5.3 documented anywhere? There are various source differences, but I didn't see any discussion in the openlibm git repo. TIA
The Java SE 24 changes in the JSR 269 annotation processing API, javax.lang.model.* and javax.annotation.processing, are through maintenance review for the release:
jcp.org/en/jsr/resul...
jcp.org/en/jsr/resul...
The Java Community Process(SM) Program - JSRs: Java Specification Requests - results
jcp.org
January 23, 2025 at 5:05 AM
The Java SE 24 changes in the JSR 269 annotation processing API, javax.lang.model.* and javax.annotation.processing, are through maintenance review for the release:
jcp.org/en/jsr/resul...
jcp.org/en/jsr/resul...
The JSR 269 annotation processing API, javax.lang.model.* and javax.annotation.processing, is up for maintenance review for the changes being proposed in Java SE 24: jcp.org/aboutJava/co...
Send your comments to the OpenJDK compile-dev list.
Send your comments to the OpenJDK compile-dev list.
The Java Community Process(SM) Program - communityprocess - maintenanceJSR-000269 Pluggable Annotation Processing API - Maintenance Review 17
jcp.org
December 18, 2024 at 7:27 PM
The JSR 269 annotation processing API, javax.lang.model.* and javax.annotation.processing, is up for maintenance review for the changes being proposed in Java SE 24: jcp.org/aboutJava/co...
Send your comments to the OpenJDK compile-dev list.
Send your comments to the OpenJDK compile-dev list.
Had solar panels installed earlier this year and my local utility, PG&E, is estimating true-up reconciliation of NaN dollars at the system anniversary date. I'm going to be careful which account NaN dollars gets deposited into!
December 13, 2024 at 8:51 PM
Had solar panels installed earlier this year and my local utility, PG&E, is estimating true-up reconciliation of NaN dollars at the system anniversary date. I'm going to be careful which account NaN dollars gets deposited into!
For those of us in the bay area, with one of the first rain storms of the season, a reminder to check the local storm drains to see if they are clear of debris blocking their flow.
December 13, 2024 at 1:51 AM
For those of us in the bay area, with one of the first rain storms of the season, a reminder to check the local storm drains to see if they are clear of debris blocking their flow.
Achievement unlocked: all expected food shopping for Thanksgiving dinner 2024 complete!
November 26, 2024 at 10:08 PM
Achievement unlocked: all expected food shopping for Thanksgiving dinner 2024 complete!
On Friday evening at a trivia contest that was a fundraiser for a literacy project, one of the questions was "What programming language is named after Indonesian coffee?"
Knowledge of Java is useful in so many contexts!
Knowledge of Java is useful in so many contexts!
November 17, 2024 at 5:26 PM
On Friday evening at a trivia contest that was a fundraiser for a literacy project, one of the questions was "What programming language is named after Indonesian coffee?"
Knowledge of Java is useful in so many contexts!
Knowledge of Java is useful in so many contexts!
Don't need the full range and precision of 32-bit float? Experiment with 16-bit floating-point arithmetic with jdk.incubator.vector.Float16 in #JDK24:
download.java.net/java/early_a...
#OpenJDK
download.java.net/java/early_a...
#OpenJDK
Float16 (Java SE 24 & JDK 24 [build 24])
declaration: module: jdk.incubator.vector, package: jdk.incubator.vector, class: Float16
download.java.net
November 15, 2024 at 12:03 AM
Don't need the full range and precision of 32-bit float? Experiment with 16-bit floating-point arithmetic with jdk.incubator.vector.Float16 in #JDK24:
download.java.net/java/early_a...
#OpenJDK
download.java.net/java/early_a...
#OpenJDK
Interesting new Javadoc feature in JDK 24 build 24: index page for index terms defined in the Javadoc sources:
download.java.net/java/early_a...
#OpenJDK #JDK24
download.java.net/java/early_a...
#OpenJDK #JDK24
Search Tags (Java SE 24 & JDK 24 [build 24])
search tags
download.java.net
November 14, 2024 at 9:47 PM
Interesting new Javadoc feature in JDK 24 build 24: index page for index terms defined in the Javadoc sources:
download.java.net/java/early_a...
#OpenJDK #JDK24
download.java.net/java/early_a...
#OpenJDK #JDK24