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Java
Self-Learning-Java
2w
220
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Getting Started with Prometheus in Java: A Hello World Example Using client_java
- To start working with Prometheus in Java, a Hello World example using client_java library is provided.
- First step includes creating a new maven project 'prometheus-demos' and updating pom.xml with necessary Prometheus dependencies.
- Second step involves creating a package 'com.sample.app' and defining the PrometheusHelloWorld application.
- Once the application is running, metrics can be viewed by accessing the URL http://localhost:8080/metrics and configuration should be added to the prometheus.yml file.
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Dev
2w
427
Image Credit: Dev
How to Filter a Collection Using Streams in Java?
- Java 8 introduced the Stream API for functional-style operations on collections.
- Java streams are a sequence of elements supporting parallel and functional-style operations.
- To filter a collection using streams, create a stream with the stream() method from List, Set, or Map.
- Use the filter() method with a predicate to specify conditions for filtering elements.
- Filter a list of Person objects by age using streams and collect the filtered results.
- Chaining multiple filter() operations or combining conditions within a single filter() is possible.
- For complex conditions, define a separate method or use Predicate objects.
- Benefits include declarative code, lazy evaluation, and parallelization with streams.
- Best practices involve using meaningful variable names and profiling code.
- Common use cases for streams include data processing pipelines and validation.
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Infoq
2w
181
Image Credit: Infoq
Java News Roundup: JDK 25 in Rampdown, JDK 26 Expert Group, Hibernate Search, Project Crema
- This Java news roundup covers various updates in the Java ecosystem, including JDK 25 in Rampdown Phase One and the formation of the JDK 26 Expert Group.
- JEP 509, JFR CPU-Time Profiling, is targeted for JDK 25 to enhance CPU-time profiling in the JDK Flight Recorder on Linux OS.
- JDK 25 has entered Rampdown Phase One with a finalized set of 18 features for the GA release in September 2025, making it the next LTS release after JDK 21.
- JSR 401 for JDK 26 has been approved, forming an expert group with members from Azul Systems, Oracle, Eclipse Foundation, and SAP SE.
- Eclipse JNoSQL 1.1.8 release introduces support for Graph NoSQL databases and a new JNoSQL extension for Quarkus extensions.
- Hibernate Search 8.0.0.Final release brings bug fixes, ORM 7.0.0 compatibility, improved integration with Hibernate Models, and metrics aggregation support.
- Helidon 4.2.3 release includes enhancements like X-Content-Type-Options header addition and resolution for missing query parameters.
- Open Liberty 25.0.0.6-beta release features Microprofile Health 4.0, file-based health check, and new attributes for better compatibility.
- Grails 7.0.0 milestone release focuses on bug fixes, artifact name repackaging, and source code refactoring into the grails-core repository.
- JBang 0.126.0 release offers bug fixes, documentation improvements, and LazyResourceRef for lazy loading of resources from remote locations.
- Project Crema, a new Oracle Labs project, aims to enhance Native Image's closed-world assumption by enabling dynamic loading of classes at runtime.
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10 Likes
Medium
2w
169
Mastering Garbage Collection in Java
- Garbage Collection (GC) in Java is an automatic process that removes unused objects in the Heap memory space, eliminating the need for manual memory management.
- In Java, objects are considered garbage when no part of the program can reach them, and GC works in three main phases: Mark Phase, Sweep Phase, and Compact Phase.
- Memory in Java is divided into Generations like Young Gen and Old Gen, where objects initially go to Young Gen and then to Old Gen after surviving several GC cycles.
- Various GC strategies like Serial, Parallel, CMS, G1, and ZGC offer different benefits such as low pause times, better throughput and low latency balance, and ultra-low latency, catering to different use cases and applications.
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Dev
2w
243
Image Credit: Dev
My Java Journey ☕
- Jostin, a Software Developer and Systems Engineering student, shares his Java development journey through this blog.
- Java is widely used in enterprise environments and learning it can be beneficial for securing jobs at big companies.
- Starting with a course like 'Introduction to Programming and Computer Science' by freeCodeCamp.org is recommended for beginners in Java.
- Following the Java Developer Roadmap and exploring its concepts will be covered in Jostin's upcoming posts.
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14 Likes
Medium
2w
73
Image Credit: Medium
From Overseas Grad to Batik Business Manager in Central Java’s Capital: Bridging Innovation and…
- Transitioning from an advisory role to a managerial position at Putri Batik Indonesia in Semarang, the manager aimed to apply contemporary management principles in a traditional craft industry.
- Initially focusing on observation and understanding of the business's traditions and dynamics, the manager learned that change required collaboration and consensus.
- Leading a digital transformation, the manager revamped PBI's marketing approach by emphasizing brand identity, product narratives, and emotional connections on social media platforms like Instagram and TikTok.
- The digitalization efforts resulted in increased online exposure and organic sales growth, despite initial challenges in shifting the team's mindset towards digital content creation.
- Balancing diverse stakeholder interests, including production quality, sustainable growth, and market demands, required the manager to navigate various operational complexities and responsibilities.
- Lessons learned encompassed the importance of effective human resource management, transformative cultural heritage practices, and learning-based leadership for sustainable business growth.
- The manager believes that creative businesses like Putri Batik Indonesia have significant growth potential and can serve as inspiring models in Indonesia's creative industry sector.
- Encouraging young professionals to explore unconventional career paths, the manager emphasizes the value of dynamic learning experiences in shaping one's career journey.
- Ultimately, the article highlights the importance of embracing change, fostering teamwork, and adapting cultural heritage to propel traditional industries towards sustainable growth and innovation.
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4 Likes
Medium
2w
130
Image Credit: Medium
Mastering Java Streams: Functional Data Processing Made Easy
- Java Streams in Java allow for efficient data processing using sequential and parallel operations.
- Streams act as pipelines for transforming and filtering elements in Java.
- Key characteristics of Java Streams include filtering, mapping, grouping, aggregation, reducing, sorting, and pagination.
- Java Streams provide a concise, readable, and functional way to manipulate data, enhancing the development of clean and efficient Java code.
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7 Likes
Dev
2w
200
Image Credit: Dev
Starting My Java Learning Journey 🚀
- A developer has started documenting their journey of learning Java on Dev.to to help others and track progress.
- Java was chosen due to its strong typing, object-oriented programming support, widespread use in enterprise applications, and foundation in Android development.
- The developer has covered basics like variables, data types, functions, loops, and tools being used such as Java 11, VS Code, and Terminal.
- Future plans include diving into object-oriented concepts, file handling, exception handling, collections, and potentially building a small console application.
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12 Likes
Medium
2w
134
Image Credit: Medium
How to Create a Thread Pool in Java — The Right Way for Real-World Applications
- A thread pool is a group of pre-instantiated, reusable threads used to execute multiple tasks in Java.
- Java provides thread pool implementations through the ExecutorService interface in the java.util.concurrent package.
- For real-world applications, it is recommended to use ThreadPoolExecutor with a clear policy instead of Executors.newCachedThreadPool() or Executors.newFixedThreadPool().
- Thread pools in Java help in managing system resources efficiently, improving performance, and avoiding concurrency issues.
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8 Likes
Medium
2w
425
Image Credit: Medium
They Know Java, But Not Joy
- A story highlighting the struggles of a person who is proficient in Java concepts and coding skills but lacks emotional understanding and inner peace.
- Emphasizes on the importance of mental well-being and self-reflection in addition to technical skills and certifications.
- Encourages individuals to prioritize happiness and self-care alongside professional achievements.
- The message conveys the significance of being human first, valuing inner joy, self-love, and peace in the journey of personal and professional growth.
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25 Likes
Medium
2w
95
Image Credit: Medium
Final Part | Mastering Java OOP from Scratch | Abstraction | Interfaces
- Abstraction in Java OOP focuses on what a method does rather than how it is achieved.
- Abstraction can be implemented using interfaces or abstract classes to create templates that define the functionality of methods without implementing the logic.
- Abstract classes allow partial abstraction by sharing common code, while interfaces provide full abstraction with no method implementations allowed.
- Understanding abstraction, along with other OOP concepts like inheritance and polymorphism, is essential for writing clean, flexible, and scalable code in Java.
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Javacodegeeks
2w
378
Image Credit: Javacodegeeks
Will Kotlin Multiplatform Replace Java on Android by 2030?
- Kotlin Multiplatform (KMP) aims to unify codebases across platforms, offering code reuse, faster development cycles, and modern language benefits like null safety and coroutines.
- Despite Kotlin's official endorsement for Android and KMP's promise, Java's strong presence in Android with its legacy, ecosystem, and robust tooling keeps it relevant.
- KMP brings features like shared business logic, coroutines, null safety, and near-native performance, but faces challenges like tooling maturity, learning curve, library availability, and ecosystem size.
- Experts suggest a coexistence of KMP and Java on Android, with KMP handling shared logic and native languages used for UI and platform-specific features by 2030.
- Realistically, KMP will not replace Java entirely but will complement it, enabling shared codebases and faster multi-platform development.
- Developers are advised to experiment with KMP for shared logic while leveraging Java and Kotlin JVM for platform-specific needs in the evolving Android development landscape.
- The future may see a gradual transition towards KMP for new projects targeting multiple platforms while legacy Java codebases persist for years.
- KMP adoption hurdles include tooling maturity, learning curve, library compatibility, performance nuances, and the size of its ecosystem and community support.
- By 2030, Android development is expected to utilize Kotlin JVM for UI and KMP for shared logic, fostering a hybrid approach rather than exclusive language replacement.
- While KMP offers exciting multiplatform app development opportunities, Java's maturity, ecosystem, and legacy presence ensure its significance alongside KMP in the upcoming decade.
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22 Likes
Medium
2w
195
Why Learning Java Made Me a Better Frontend Developer (And How It Can Help You Too)
- Learning Java helped a frontend developer optimize payload size by proposing a solution that reduced payloads by 70%.
- Understanding Java allowed the developer to communicate effectively with the backend team using Jackson annotations as a secret weapon.
- Java literacy enabled the developer to trace frontend errors back to the backend, highlighting the importance of understanding both sides.
- Learning Java as a frontend developer can enhance your career by enabling you to speak the language used in the majority of enterprise backends, even if you still prefer JavaScript.
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11 Likes
Javarevisited
2w
305
Image Credit: Javarevisited
Student Management System Project - FullStack Java + Spring Boot + React.js Example Tutorial
- Learn to create a School Classroom Application using Spring Boot, React.js, and H2 Database.
- The project involves functionalities like creating, deleting, updating, and retrieving student data.
- Frontend is built using React.js, backend using Spring Boot, and communication is through REST APIs.
- This tutorial guides on full-stack Java development for those who wish to become full-stack Java developers.
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18 Likes
Infoq
2w
17
Image Credit: Infoq
Article: Bringing GPU-Level Performance to Enterprise Java: A Practical Guide to CUDA Integration
- Integrating CUDA with Java can bring significant performance gains ranging from ten to one hundred times for certain workloads, despite Java not being designed for CUDA.
- JNI acts as a bridge between Java and native CUDA code, allowing for offloading compute-intensive tasks like encryption, analytics, and inference to GPUs.
- Choosing between concurrency, multithreading, and true parallelism is crucial, with CUDA enabling scaling beyond Java's thread-based limits.
- Deployment of GPU acceleration in enterprise systems is now feasible using containerized workflows and memory-safe JNI patterns.
- GPU computing extends beyond AI, benefiting backend tasks like secure data processing through parallel execution at scale.
- Java's managed runtime faces challenges in meeting low-latency and high-throughput demands for HPC or data-intensive operations, making GPU acceleration with technologies like CUDA attractive.
- CUDA, primarily used with C/C++, allows developers to tap into GPUs for improved speedup times in computationally intensive tasks.
- Different execution models like multithreading, concurrency, parallelism, and multiprocessing in Java necessitate a clear understanding for effective integration with CUDA.
- CUDA provides a significant advantage in fine-grained, data-level parallelism that is challenging to achieve with standard Java multithreading.
- Tools like JCuda, JNI, and JNA offer options to integrate GPU acceleration into Java, each with its trade-offs in terms of performance and complexity.
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