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Blockchain on the JVM: Will Hyperledger Keep Java Relevant?

Java's dominance in enterprise software is being challenged by blockchain development, which has favored languages like Solidity, Rust, and Go.
JVM-based blockchains such as Hyperledger Fabric and Corda have helped keep Java relevant in permissioned enterprise chains despite Ethereum's shift to WebAssembly (WASM).
While WASM offers faster execution and broader language support, Java still maintains its niche in enterprise adoption due to regulatory compliance, legacy integration, and developer familiarity.
The future landscape suggests that while WASM excels in raw speed for public blockchains, Java is likely to remain dominant in enterprise chains, with the potential for hybrid solutions combining both technologies.

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Dev

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What is polymorphism in Java OOP?

Polymorphism is a core concept of Object-Oriented Programming in Java.
It refers to the ability of a single interface or method to operate in different ways depending on the object that invokes it.
There are two main types of polymorphism in Java: compile-time and run-time polymorphism.
Polymorphism enhances code flexibility, reusability, and plays a crucial role in implementing interfaces and achieving abstraction in Java applications.

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Dev

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Classes & Objects | Object Oriented Programming | Understanding OOP in Java | OOP Learning

Java is an object-oriented programming (OOP) language.
OOP is about creating things (objects) from blueprints (classes).
A class is a blueprint that tells Java what an object can have and can do.
An object is a real instance of a class with actual values and actions.

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Medium

315

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Java Full Stack: An Easy Guide with Coding Brushup

A Java Full Stack Developer is proficient in both client-side and server-side development.
They work with front-end technologies like HTML, CSS, JavaScript, and frameworks such as React or Angular, as well as back-end technologies including Java, Spring Boot, and Hibernate.
Essential skills for Java Full Stack Development include core Java, HTML/CSS/JavaScript, SQL/NoSQL databases, Git, RESTful APIs, DevOps tools, cloud platforms, testing frameworks, and security measures.
To become a Java Full Stack Developer, a structured learning path involving core Java, front-end and back-end development, database management, DevOps tools, testing and debugging, security measures, and continuous learning is recommended.

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Javarevisited

192

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Integer Caching in Java Explained: Why 1 == 1 is True but 128 == 128 is False!

Primitives (like int) use value comparison when using ==. Objects (like Integer) use reference comparison when using ==.
Java maintains an internal cache of frequently used Integer objects in the range -128 to 127 to optimize memory usage.
When numbers are within the cache range, Java reuses existing objects; otherwise, new objects are created.
It is recommended to use .equals() for value comparison when working with wrapper classes.

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Javacodegeeks

393

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Project Leyden: Revolutionizing Java Performance with AOT Compilation

Project Leyden aims to address Java's slow startup times by introducing native-like performance through Ahead-of-Time (AOT) compilation.
Java's traditional applications with JIT compilation can take 2-5 seconds to initialize, hindering their suitability for serverless, microservices, and CLI tools.
Project Leyden analyzes Java's technical startup bottlenecks and contrasts its architecture with solutions like GraalVM.
Comparative cold start times highlight Java's slower initialization compared to Go, Rust, Node.js, and Python.
Project Leyden's multi-stage compilation model involves static analysis, AOT compilation, and a hybrid runtime, offering selective AOT compilation and enhanced Class Data Sharing.
Performance benchmarks show Leyden achieving faster startups than standard JVM and better compatibility than GraalVM Native, with memory usage between JIT and full native.
Leyden's practical implications include benefits for serverless computing, microservices in Kubernetes, and improved developer experience through build process changes and debugging enhancements.
The roadmap outlines Leyden's adoption timeline leading to widespread ecosystem support by 2026, with potential limitations in dynamic code challenges and tooling maturity.
Overall, Project Leyden signifies a significant advancement in Java runtime technology, promising competitiveness in serverless, reduced cloud costs, and improved developer productivity while maintaining compatibility.
The future outlook positions Java with Leyden at the forefront for enterprise development and performance-sensitive domains traditionally reserved for other languages like C++, Rust, and Go.
Developers are encouraged to experiment with Leyden prototypes for new projects, plan for gradual adoption in existing microservices, and combine with Vector API for numerical computing to embrace the Java ecosystem's transformation.

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Infoq

306

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Java News Roundup: Gradle 8.14, JBash Jash, Hibernate, Open Liberty, Spring Cloud Data Flow

The Java news roundup for April 21st, 2025 covers the Gradle 8.14 GA release, JBang's introduction of Jash, Hibernate ORM 7.0 RC1, Open Liberty April edition, and the end of open-source support for Spring Cloud Data Flow.
OpenJDK features JEP advancements for compact source files, flexible constructor bodies, and module import declarations for JDK 25.
GlassFish 7.0.24 maintenance release includes bug fixes, dependency upgrades, and support for JDK 24.
Spring Framework's teams deliver various first release candidates and milestone releases, with Spring Cloud Data Flow transitioning to a commercial offering.
IBM releases Open Liberty 25.0.0.4 with support for Java 24, audit log collection, InstantOn features, and vulnerability resolutions.
Quarkus 3.21.4 brings changes like StackOverflowError resolution and warnings for HttpSecurityPolicy interface instances with duplicated names.
Helidon 4.2.1 release includes bug fixes and improvements in metrics reporting and configurable buffering.
Hibernate ORM 7.0.0 RC1 introduces new features like QuerySpecification interface and Jakarta Persistence 3.2 support, alongside a migration guide.
JBang introduces Jash, a new Java library for process and shell scripts execution, providing predictability and a smooth developer experience.
Gradle 8.14 release offers JDK 24 support, lazy dependency configuration initialization, and an integrity check mode for better configuration cache debugging.

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Javacodegeeks

155

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Can Java Ever Be as Fast as Rust or C++?

Java has traditionally lagged behind Rust and C++ in raw performance, but recent advancements in the JVM ecosystem are closing the gap.
Rust and C++ outperform Java in certain scenarios due to manual memory management, zero-cost abstractions, direct hardware access, and no JVM overhead.
Project Panama aims to improve Java's interoperability with native code, reducing the overhead of calling C/C++ libraries and enabling better hardware access.
The Vector API, part of Project Panama, brings explicit SIMD operations to Java, getting it within ~10% of C++ for vectorized workloads.

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Medium

137

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Title: Java’s New Era: No More Mandatory main()? Here’s What You Need to Know

Java has removed the mandatory main method.
The new Java version (Java 21) allows the code to run without a main method.
This change makes Java lighter, friendlier, and more beginner-accessible.
Java 21 allows code to be run instantly without the need for a compilation step.

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Medium

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Mastering Bitwise Operators in Java: Explained with Binary, Math, and Real Examples!

1️⃣ & (AND)
Binary Calculation:
2️⃣ | (OR)
Binary Calculation:

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Medium

178

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Java Remains a Backend Powerhouse in 2025 (Even vs Go, Python or TypeScript)

Java remains a heavyweight in the backend world, with a massive community and a vast ecosystem of frameworks and libraries, making it popular in enterprises.
Frameworks like Spring Boot and Jakarta EE dominate for microservices and APIs, while newer alternatives like Quarkus and Micronaut offer faster startup times for cloud-native services.
Java's static typing and tooling catch errors at compile time, and modern Java versions add features to reduce boilerplate.
Go, designed for simplicity and concurrency, appeals to building performant APIs and microservices with an easy deployment process via static binaries.
Python's extensive ecosystem offers frameworks like Django and Flask for backend development, but its dynamism may lead to runtime bugs and lower performance.
TypeScript's optional static types and huge ecosystem on Node.js make it a mainstream choice for backend development, providing flexibility and safety.
Norm4j simplifies mapping entities to DTOs in Java, reducing boilerplate and enabling efficient data transfer in backend development.
Java continues to evolve, offering a blend of agility, robustness, and cloud-friendly speed, making it a future-proof choice for backend development.
While Go, Python, and TypeScript are rising stars, Java's maturity and continuous evolution keep it relevant and modern in backend development.
Investing in Java as a beginner means learning a proven technology that remains highly relevant for building modern applications and services.

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Medium

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Getting Started with Java Thread Pools in Web Backend Applications

ThreadPoolTaskExecutor is a commonly used thread pool implementation in Java web backend development.
Finding the optimal pool size and queue capacity requires performance testing and monitoring.
ThreadPoolTaskExecutor is used to submit tasks for execution, with methods like submit(Runnable task).
CompletableFuture in Java 8 provides a flexible approach to asynchronous programming with integration to Executor.

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Javacodegeeks

247

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AI-Generated Java: Future or Tool?

The rise of AI-powered coding assistants like GitHub Copilot, Amazon CodeWhisperer, and Google’s Studio Bot is transforming how Java developers work.
AI in Java development accelerates boilerplate code generation, refactoring, code optimization, debugging, and error resolution.
Despite advancements, AI still struggles with business logic, architectural decisions, and creative problem-solving.
AI is reshaping the role of developers, requiring them to validate AI suggestions, write effective AI instructions, and focus on high-level architecture.

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Javarevisited

206

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Top 5 Online Courses to Learn Modules and Java 9 Features in 2025 - Best of Lot

The last couple of years was the year of releases for Java developers.
One of my top priority goals for this year is to learn new Java features as quickly as possible.
Java 9 release introduces a modular JDK so that developers can only include the modules that they need.
Java, Unix, Tibco RV, and FIX Protocol tutorial.

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