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Analyticsindiamag
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The Java Secret of Netflix
- Java continues to be a powerful choice for Netflix despite not being the trendiest language, with advancements made for developing AI-infused applications.
- Netflix uses Java for two sides of its tech stack - global streaming service and Netflix Studios, both emphasizing the importance of Java in data integrity and operations.
- Netflix upgraded its backend Java stack to JDK 17 and beyond, resulting in significant performance improvements, including a 20% reduction in CPU time spent on garbage collection.
- Netflix transitioned away from reactive programming towards synchronous code powered by virtual threads, with plans to adopt new technologies like GraphQL and Project Leyden to further enhance performance.
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Infoq
1M
144
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Presentation: Ultra-fast In-Memory Database Applications with Java
- The presentation discusses ultra-fast in-memory database processing with Java, showing how to build the fastest database applications by leveraging a framework used by gaming and banking companies for two decades.
- It emphasizes the importance of high performance, low data storage costs, simplicity for developers, and sustainability for organizations in modern applications.
- The speaker, Markus, with over 20 years of Java experience, introduces Eclipse Foundation projects like Jakarta EE, Micronaut, and Helidon before delving into current challenges in database development.
- He highlights issues like slow performance, high cloud costs, complexity, and lack of sustainability in traditional database programming.
- The talk addresses the limitations and challenges of object-relational mapping, impedance mismatches, and the compatibility issues between Java and databases.
- It explores the differences in NoSQL databases and their compatibility with Java, mentioning the need for a new approach to database development for modern applications.
- The alternative solution presented is EclipseStore, a Java-native, in-memory persistence engine that offers ultra-fast data processing, significant cost savings, and environmental benefits by eliminating the need for traditional database servers.
- Markus explains the EclipseStore workflow of seamlessly storing Java objects to disk without the need for object-relational mapping, emphasizing the simplicity and effectiveness of the approach.
- He introduces the Eclipse Serializer at the core of EclipseStore, detailing its persistence engine, handling of concurrency, and compatibility with distributed systems for high-speed data processing.
- The talk concludes by highlighting that EclipseStore, while requiring Java developers to adapt their mindset, provides a comprehensive and efficient approach to building high-performance applications with low latency and cost savings.
- The speaker invites attendees to explore free training resources for EclipseStore and emphasizes its potential as a drop-in replacement for Hibernate, suitable for various applications and enterprise use cases.
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Medium
1M
253
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Mastering Java Generics <>: Interview Questions You Need to Know
- Generics in Java may seem simple but can be confusing, especially in interviews.
- Understanding core principles of Generics can enhance code quality and interview performance.
- Using type parameters like
, , - Bounds can restrict types used with generics, with examples like not being able to assign List
to List
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15 Likes
Medium
1M
361
Why Java Still Forces You to Write Functions Inside a Class — and What That Says About Its Broken…
- Java was designed for corporations and control, not individual developers, leading to the requirement of writing functions inside a class since 1995.
- The necessity of placing every utility function within a class in Java is based on the 'everything is an object' philosophy of OOP, which has become outdated with the evolution of UIs, APIs, microservices, and mobile apps.
- Kotlin introduced top-level functions, null safety, extension functions, and coroutines, providing more flexibility and modern features that Java lacks.
- Java's reluctance to adapt and evolve restricts developers and prevents the language from keeping up with the changing demands of software development.
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Dev
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235
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Mastering compareTo() in Java: A Complete Guide with Examples
- The compareTo() method in Java is crucial for sorting and comparing objects, defining natural ordering based on a three-way comparison.
- It is essential for sorting collections like lists and arrays, implementing logic based on object hierarchy, and filtering data in real-time applications.
- Common usage includes comparing strings lexicographically and numbers when wrapped in their respective wrapper classes.
- Implementing compareTo() in custom classes allows full control over the comparison criteria, ensuring consistency and avoiding issues.
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14 Likes
Dev
1M
198
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Can You Pass a List of Child Objects to a Parent Function in Java?
- In Java, passing a collection of child objects to a method expecting a collection of parent objects can be challenging due to Java's type system and generics implementation.
- Java's type checking mechanism does not allow passing List
to a method that expects List due to type safety concerns. - One solution is to use wildcards to make the method flexible, allowing it to accept any subtype of Parent in the list.
- Alternatively, you can convert the list of child objects to a list of parent objects before passing it to the method needing the parent objects.
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11 Likes
Dev
1M
7.3k
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🚀 Day 1 of My 30-Day Core Java Challenge – Learning with Udemy!
- A developer has started a 30-Day Core Java Challenge to strengthen their fundamentals and grow as a developer.
- They are learning Core Java through a Udemy course covering Java basics, Object-Oriented Programming, Collections, Exception handling, and more.
- Goals for the challenge include studying Java daily, building mini projects, sharing progress, and connecting with others learning Java.
- Day 1 progress includes installing JDK, setting up IntelliJ IDEA, learning about Java Virtual Machine (JVM, JRE & JDK), and writing a Hello World program.
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35 Likes
Medium
1M
185
7 Common Problems Users Face While Installing JDK (Java Development Kit) – And How to Fix Them
- Problems with JDK installation often arise due to incorrectly set environment variables causing the system to not locate the JDK properly.
- Ensure the JAVA_HOME environment variable is set to the JDK path and add %JAVA_HOME%\bin to the system Path variable to resolve these issues.
- Downloading the correct JDK version that matches your system type, uninstalling conflicting JDK or JRE versions, and granting proper permissions during installation are crucial for successful setup.
- Manually configuring JDK locations in IDEs like Eclipse or IntelliJ and overcoming macOS restrictions on unsigned apps or permissions are necessary steps for proper JDK installation.
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Infoq
1M
379
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JEP 505 Delivers Fifth Preview of Java's Structured Concurrency with Key API Refinements
- JEP 505, the Structured Concurrency Fifth Preview, has achieved Targeted status in JDK 25, serving to simplify parallel task management for developers, especially with virtual threads.
- The latest preview refines the API introduced in preceding iterations and enables developers to open a scope using static factory methods like StructuredTaskScope.open().
- Structured concurrency focuses on confining subtask lifetimes, implementing reliable cancellation, and enhancing observability through structured thread hierarchies.
- The API revolves around the java.util.concurrent.StructuredTaskScope class, facilitating the management of concurrent subtasks within a specified scope.
- A coding example illustrates the usage pattern, where tasks are forked, executed concurrently, and then joined within the scope, ensuring completion or cancellation before leaving the block.
- A notable improvement in the fifth preview includes factory method usage for scope creation, enhancing readability and accommodating future API evolution without compatibility issues.
- Custom policies can be supplied via factory methods like StructuredTaskScope.open(Joiner) to define specific task completion behaviors.
- The Joiner interface offers flexibility for implementing custom completion policies, ensuring proper handling of subtask operations within the scope.
- Each Joiner instance should be exclusively used within a single StructuredTaskScope and not across different scopes or after closure.
- Developers are encouraged to experiment with the Structured Concurrency Fifth Preview in JDK 25 to provide feedback for further maturing the API.
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22 Likes
Infoq
1M
135
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Java News Roundup: OpenJDK JEPs, Hibernate Reactive, Infinispan, JHipster, Gatherers4j
- This Java news roundup covers OpenJDK JEPs, Hibernate Reactive, Infinispan, JHipster, and Gatherers4j.
- Two JEPs, JEP 513 and JEP 505, have been targeted for JDK 25, focusing on Flexible Constructor Bodies and Structured Concurrency.
- Three JEPs elevated to Proposed for JDK 25 include Key Derivation Function API, Vector API, and Scoped Values.
- JEP 518 advances to Candidate status, aiming to enhance JDK Flight Recorder stability by sampling Java thread stacks.
- JEP 516, proposing object caching with any garbage collector, moves to Candidate status for improved startup performance.
- For JDK 25, there are nine significant JEPs, including Stable Values, Scoped Values, and Compact Source Files.
- The JDK 25 early-access Build 22 brings fixes and updates to enhance the upcoming release version.
- Updates in JNoSQL 1.1.7 focus on bug fixes and enhancements, offering support for new ValueReader implementations.
- Quarkus 3.22.2 release addresses bug fixes, including improvements in handling Jakarta RESTful Web Services annotations.
- Hibernate Reactive 3.0.0 RC1 delivers JReleaser support, new interfaces, and methods, aligning with Jakarta Persistence standards for improved flexibility.
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Scand
1M
9
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Why Java Is Still a Good Choice for Enterprise Software Development
- Java has been a popular programming language for enterprise software development, with a significant market demand.
- Although Java faced competition from newer technologies post-2015, it continues to be a leading choice for enterprise development.
- Java is widely used in sectors like banking, finance, and the public sector where legacy systems are prominent.
- With a market share of about 35-45%, Java competes with languages like C#, Python, and JavaScript for enterprise development.
- Java's scalability, flexibility, powerful ecosystem, security features, and long-term support make it ideal for large enterprises.
- Java's compatibility with legacy systems, modernization capabilities, and support for cloud-native development contribute to its relevance.
- Comparing Java with other technologies like C#, Python, and Node.js highlights Java's strengths in stability, performance, scalability, and security.
- Java finds applications in various fields like banking, government, SaaS, and healthcare due to its reliability and data security features.
- Java's support for legacy systems, transition to modern architectures, and cloud-native development make it a versatile choice for enterprises.
- Partnering with companies like SCAND for Java enterprise software development services can lead to successful modernization and high-performance solutions.
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Dev
1M
131
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How to Implement an Undo Feature for Database Records in Java?
- Implementing an Undo Feature for Database Records in Java can be achieved by leveraging the Memento design pattern at a database level to handle the history of updates for an entity.
- Maintaining a history of changes in the database allows users to revert to previous states with a simple 'Undo' button, improving user experience and preventing data loss.
- The proposed database model includes tables for MyEntity to store the current state and MyEntityUpdates to track the history of updates, facilitating the undo functionality.
- By following the implementation steps, which include creating entities, updating entities while storing history, and implementing the undo operation, developers can successfully incorporate an undo feature for database records in Java.
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7 Likes
Dev
1M
27
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Understanding Cortex Java SDK: Open Source Funding, Blockchain AI, and Future Innovation
- The Cortex Java SDK merges blockchain and artificial intelligence, focusing on open source business models and decentralized inference capabilities.
- It leverages Apache 2.0 licensing and innovative funding mechanisms to foster sustainable development and community engagement.
- The project addresses the need for secure and transparent AI deployments through decentralized inference and smart contract integration.
- Key features include modular architecture, decentralized funding strategies, and community-driven governance.
- Applications range from data security to transparent funding and enhanced interoperability in blockchain networks.
- Challenges include technical complexity, adoption barriers, scaling issues, and regulatory uncertainties.
- Future trends include enhanced decentralization, integration of emerging AI techniques, and advancements in tokenized funding models.
- The Cortex Java SDK sets new standards in open source innovation with Apache 2.0 licensing and tokenized rewards.
- Promising a future with improved scalability, deeper AI integration, and a growing community, Cortex paves the way for sustainable open source projects.
- By blending blockchain and AI, Cortex Java SDK offers decentralized, secure, and transparent AI model deployment.
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Dev
1M
326
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Hedera Examples Java: Open Source Funding, Community & Blockchain Innovations
- Hedera Examples Java showcases how blockchain tech, open source funding, and community drive innovation under Apache 2.0 license.
- It offers practical code for smart contracts, consensus mechanisms, and tokenization on the Hedera network.
- The project aligns with open source principles and fosters collaboration in blockchain development.
- Funding via crowdfunding and sponsorships ensures decentralization and collaborative financial support.
- Apache 2.0 licensing preserves code freedom, transparency, and encourages collaboration.
- Community engagement is vital, with hackathons, forums, and funding dashboards enhancing participation.
- The project benefits developers by simplifying blockchain concepts and providing educational tools.
- Sample code assists in building dApps, integrating decentralized storage, and exploring tokenization services.
- Challenges include technical complexity, funding variability, and adapting to evolving legal frameworks.
- Future trends include enhanced interoperability, security protocols, and community-driven enhancements.
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19 Likes
Dev
1M
286
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How to Find the Second Highest Student Average Mark in Java?
- In this article, we discuss how to find the student with the second highest average mark among a list of students in Java.
- Key steps include sorting the students based on average mark and handling ties by comparing date of birth.
- The code snippet provided gives insights into implementing the findSecondBestStudent function using Java streams and custom comparators.
- The solution ensures we find the student with the second highest average mark without creating new objects, making the code efficient and concise.
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