Hacker News with Generative AI: Java

Show HN: Samchika – A Java Library for Fast, Multithreaded File Processing (github.com/MayankPratap)
Samchika (meaning File in Sanskrit) is a re-usable, easy-to-use, and extremely fast file processing library for the Java language.

Java, File Processing, Libraries, Multithreading

27 points by mprataps 4 hours ago | 19 comments

What Is Spring Framework? An Unorthodox Guide (2022) (marcobehler.com)
At its core, Spring framework is really just a dependency injection container, with a couple of convenience layers (think: database access, proxies, aspect-oriented programming, RPC, a web mvc framework) added on top. It helps you build Java application faster and more conveniently.

Java, Spring Framework, Software Development, Dependency Injection

5 points by Tomte 5 hours ago | 1 comments

JEP 519: Compact Object Headers (openjdk.org)
Change compact object headers from an experimental feature to a product feature.

Java, Programming Languages, Software Development, OpenJDK, JEP

71 points by Skinney 1 day ago | 10 comments

Show HN: JavaFactory – IntelliJ plugin to generate Java code (github.com/JavaFactoryPluginDev)
JavaFactory is a tool that uses LLMs to automatically generate repetitive Java code.

Java, IntelliJ, Programming, Tools, AI

44 points by javafactory 3 days ago | 26 comments

Show HN: Jar.tools – View, Change, Decompile Java Jar Files (jar.tools)

Java, Software, Tools, Development

9 points by Igor_Wiwi 4 days ago | 0 comments

Show HN: Fahmatrix – A Lightweight, Pandas-Like DataFrame Library for Java (github.com/moustafa-nasr)
Fahmatrix is a lightweight, modern Java library for working with tabular data, inspired by Python's Pandas and rooted in the idea of making data understanding (fahm) easy on the JVM.

Java, Data Analysis, Libraries, Python, Pandas

46 points by mousomashakel 7 days ago | 13 comments

Java at 30: Interview with James Gosling (thenewstack.io)

Java, Programming Languages, Interviews, History, Anniversaries

251 points by chhum 7 days ago | 417 comments

Lessons from Mixing Rust and Java: Fast, Safe, and Practical (medium.com)

Rust, Java, Programming Languages, Performance, Software Development

115 points by killme2008 9 days ago | 42 comments

Fixrleak: Fixing Java Resource Leaks with GenAI (uber.com)

Java, Resource Leaks, Generative AI, Software Engineering

17 points by carimura 10 days ago | 15 comments

Understanding Java's Asynchronous Journey (amritpandey.io)
Asynchronous programming skills are no longer “nice-to-have”; almost every programming language has it and uses it.

Java, Asynchronous Programming, Software Development

17 points by hardasspunk 10 days ago | 10 comments

Java build tooling could be so much better (Seattle Java User Group) [video] (youtube.com)

Java, Programming Languages, Development Tools, Software Development

4 points by lihaoyi 11 days ago | 3 comments

Netflix Is Built on Java (youtube.com)

Java, Netflix, Programming, Software Engineering

5 points by birdculture 11 days ago | 0 comments

JEP 515: Ahead-of-Time Method Profiling (openjdk.org)
Improve warmup time by making method-execution profiles from a previous run of an application instantly available, when the HotSpot Java Virtual Machine starts. This will enable the JIT compiler to generate native code immediately upon application startup, rather than having to wait for profiles to be collected.

Java, Optimization, Performance, Virtual Machines, Programming Languages

101 points by cempaka 12 days ago | 10 comments

Mill as a direct style build tool (mill-build.org)
Mill is a JVM build tool that targets Java/Scala/Kotlin and has potential to serve the large-monorepo codebases that Bazel currently serves. Mill has good traction among its users, benchmarks that demonstrate 3-6x faster builds than its competitors, and a unique "direct-style" design that make it easy to use and extend. This page discusses some of the most interesting design decisions in Mill, and how it sets Mill apart from other build tools on the market.

Java, Scala, Kotlin, Build Tools, Software Development

41 points by lihaoyi 13 days ago | 9 comments

Users advised to review Oracle Java use as Big Red's year end approaches (theregister.com)
Experts are warning of an increase in Oracle Java audits - as the tech giant nears its year end - following a switch to a per-employee license model that could see costs grow by up to five times.

Oracle, Java, Licensing, Technology, Finance

8 points by rntn 14 days ago | 7 comments

Pauseless Garbage Collector (github.com/dotnet)
Is there any reason why something like the Pauseless Garbage Collector wich exists for Java from Azul never was implemented for Dotnet?

.NET, Garbage Collection, Java, Performance

6 points by algorithmsRcool 14 days ago | 2 comments

Fixrleak: Fixing Java Resource Leaks with GenAI (uber.com)

Java, Resource Leaks, Generative AI, Software, Tools

22 points by benocodes 16 days ago | 23 comments

Using tests as a debugging tool for logic errors (qodo.ai)
In Java development, logic errors constitute a unique class of defects where code executes flawlessly according to its written instructions while systematically violating business requirements.

Java, Debugging, Testing, Logic Errors

38 points by simplesort 16 days ago | 15 comments

Performance Improvements in JDK 24 (inside.java)
This article summarizes the performance improvements made in JDK 24 compared to JDK 23 by highlighting some of the most noteworthy progressions. In order to facilitate traceability, the improvements are listed per issue (or per umbrella issue explained in the note below) as entered into the official JDK Bug System. Let’s check them all out!

Java, Performance, JDK, Software Development, Open Source

7 points by todsacerdoti 17 days ago | 0 comments

Strings Just Got Faster (inside.java)
In JDK 25, we improved the performance of the class String in such a way that the String::hashCode function is mostly constant foldable. For example, if you use Strings as keys in a static unmodifiable Map, you will likely see significant performance improvements.

Java, Performance, String, Hash Code, JDK 25

246 points by Tomte 22 days ago | 181 comments

Copyleft makes the (Java) world turn around (2016) (wildebeest.org)
Glad to see a little bit more copyleft being adopted by Android now that they are using parts of the OpenJDK class library. Even if the GNU Classpath Exception is probably the weakest form of copyleft there is. It is interesting how the GPL makes frenemies like Oracle and Google work together.

Java, Open Source, Copyleft, GPL

4 points by pabs3 28 days ago | 0 comments

How ZGC allocates memory for the Java heap (joelsiks.com)
This post explores how ZGC, one of the garbage collectors in the OpenJDK, allocates memory for the Java heap, focusing on enhancements introduced in JDK-8350441 with the Mapped Cache. A garbage collector does much more than just collect garbage - and that’s what I want to unpack in this post. Whether you’re a Java nerd yearning for details, a GC enthusiast, or just curious about how ZGC uses memory behind the scenes, this deep dive is for you.

Java, Garbage Collection, OpenJDK, Memory Management, Performance

86 points by lichtenberger 30 days ago | 18 comments

GraalVM 24.0.1 (graalvm.org)
This is the April 2025 Oracle Critical Patch Update (CPU) for GraalVM Community Edition for JDK 24.

New Releases, Java, Oracle, Software

4 points by sgammon 38 days ago | 0 comments

JEP 506: Scoped Values final for Java 25 (openjdk.org)
Introduce scoped values, which enable a method to share immutable data both with its callees within a thread, and with child threads. Scoped values are easier to reason about than thread-local variables. They also have lower space and time costs, especially when used together with virtual threads (JEP 444) and structured concurrency (JEP 505).

Java, Programming Languages, Concurrency

34 points by ludovicianul 38 days ago | 9 comments

JRuby 10 released with support for Ruby 3.4 (jruby.org)
The JRuby community is pleased to announce the release of JRuby 10.0.0.0.

New Releases, Programming Languages, Ruby, Java

12 points by headius 39 days ago | 3 comments

Are .NET 4.x and JDK 8.x the "zombie" runtimes of enterprise software? (ycombinator.com)
I've noticed a strong parallel between Microsoft's .NET Framework 4.x and Oracle's JDK 8.x series. Even though newer versions keep rolling out — .NET Core, .NET 6/7/8, JDK 11/17/21 — these older versions just won’t die.

.NET, Java, Enterprise Software

68 points by pyeri 43 days ago | 91 comments

Java is dying and it paid off my mortgage (alyosha.net)
Have you ever been afraid your current tech stack at work will limit your career options in the future?

Java, Programming Languages, Careers, Technology

20 points by nkzd 45 days ago | 22 comments

JEP draft: Prepare to make final mean final (openjdk.org)
Issue warnings about uses of deep reflection to mutate final fields. The warnings aim to prepare developers for a future release that ensures integrity by default by restricting final field mutation; this makes Java programs safer and potentially faster. Application developers can avoid both current warnings and future restrictions by selectively enabling the ability to mutate final fields where essential.

Java, Programming Languages, Security, Software Development, Open Source

207 points by mfiguiere 53 days ago | 141 comments

Browsercraft: Java Minecraft in the browser (cheerpj.com)
This is a proof-of-concept demo of Minecraft 1.2.5 running unmodified in the browser.

Java, Minecraft, Web Development, Gaming

166 points by John7878781 53 days ago | 101 comments

Tail Call Recursion in Java with ASM (2023) (unlinkedlist.org)
One kind of optimization offered by some compilers is tail call optimization. This optimization does not bring much, since the programmer can always tailor his code without recursion, especially in an imperative language. On the other side, recursive code often times more elegant, so why we don’t let the compiler do the nasty stuff when it is possible? In this article I will present a neat way to implement tail call optimization in Java using byte code manipulation with ASM.

Java, Optimization, Recursion, Compilers, Bytecode Manipulation

96 points by hyperbrainer 54 days ago | 48 comments