Best of Java — January 2025

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    Article
    Avatar of javarevisitedJavarevisited·1y

    Why become a Certified Java Developer in 2025

    Becoming a certified Java developer in 2025 can significantly boost your career by validating your skills and knowledge. Java certifications, such as Java SE 11, 17, and the latest Java SE 21, offer industry recognition, enhanced job opportunities, and higher earning potential. Preparing for these certifications involves understanding the exam objectives, practicing extensively with coding exercises and mock tests, and utilizing various online resources and communities. Java SE 21 is particularly recommended for future-proofing your career with its latest features and enhancements.

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    Article
    Avatar of java_libhuntAwesome Java Newsletter·1y

    Spring AI + Java

    This tutorial explains how to integrate Spring AI applications with mcp.run's tool ecosystem. Instructions include creating a chat interface to interact with external tools using OpenAI, setting up required tools, configuring parameters, creating a Spring Boot application, and testing the integration. The complete source code for different implementations is available in the mcpx4j repository.

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    Article
    Avatar of javarevisitedJavarevisited·1y

    Is Java still relevant in 2025?

    Java remains relevant in 2025 due to its widespread enterprise adoption, prominence in Android development, robust backend frameworks, cross-platform capabilities, and significant role in Big Data and AI. New features in JDK 24 enhance performance and security. Java developers continue to have high demand and earning potential, making it a stable career choice.

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    Article
    Avatar of java_libhuntAwesome Java Newsletter·1y

    How To Do Logging In Java

    Discover the right logging library for your Java applications and understand how to configure and use them effectively. This guide covers legacy and modern logging libraries including java.util.logging, Log4j, Logback, and SLF4J. Learn best practices for logging, such as choosing appropriate log levels, ensuring proper message contents, and implementing centralized logging solutions within Java applications.

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    Article
    Avatar of jrebelJRebel·1y

    What's New With Java 24

    Java 24, a short-term JDK release scheduled for March 2025, will introduce 24 new features, including experimental, incubator, preview, and permanent JEPs. Key highlights include the Generational Shenendoah garbage collector and compact object headers. Java 24 will be replaced by long-term support Java 25 in September 2025.

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    Article
    Avatar of netguruNetguru·1y

    Java Concurrency: Essential Techniques for Efficient Multithreading

    Java supports concurrent programming through its built-in features and class libraries, aiding the development of robust and scalable applications. Java concurrency includes basic thread creation, synchronization mechanisms, and high-level APIs from the java.util.concurrent package. It's crucial for improving application performance and solving complex problems. Core concepts include thread management, synchronization, locks, and advanced utilities like the Fork/Join framework and virtual threads (Project Loom). Proper error handling, best practices, and understanding design patterns are essential for writing efficient and reliable concurrent programs.

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    Article
    Avatar of jetbrainsJetBrains·1y

    Best Courses for Java Developers

    Discover top-rated courses for Java developers designed to enhance your skills. From Coursera's beginner-friendly tracks to advanced concepts by Java Champions, these courses cover essential programming concepts, object-oriented programming, Spring framework, and more. Learn with platforms like Udemy, Hyperskill, Amigoscode, and Mosh Hamedani's comprehensive lessons, featuring hands-on projects and real-world applications. Options include free, subscription-based, and lifetime access courses, providing flexibility and accredited certification opportunities.

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    Article
    Avatar of javarevisitedJavarevisited·1y

    Essential Java Tips and Tricks Every Developer Should Know

    Java developers should master the fundamentals, adhere to naming conventions, understand their code and algorithms, employ unit testing, avoid empty catch blocks, and refrain from hardcoding. Regularly studying and practicing coding are essential for skill improvement. Utilizing design patterns and keeping up with Java's evolving ecosystem will help maintain high-quality, efficient code. Prioritize interfaces over abstract classes for multiple inheritance, and leverage the extensive standard library to enhance code flow and productivity.

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    Article
    Avatar of javarevisitedJavarevisited·1y

    Declarative Programming in Java

    Declarative programming simplifies code by describing the desired outcome rather than the execution steps. Java Streams exemplify this by abstracting iteration details. However, understanding underlying mechanisms is crucial for performance, especially with parallel streams. While annotations like those in JUnit or Spring offer ease, they come with runtime risks. Balance declarative elegance with imperative control for optimal performance and maintainability.

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    Article
    Avatar of java_libhuntAwesome Java Newsletter·1y

    A Beginner’s Guide to Java: 10 Must-Know Development Tools🎉🎉

    Java is expected to remain a dominant programming language by 2025. This guide highlights ten essential tools for Java developers, including IntelliJ IDEA, Maven, Git, Docker, Apidog, JUnit, Eclipse, Gradle, Jenkins, and VisualVM. Each tool offers unique advantages in enhancing productivity, code quality, and project management. While some tools are free, others may require payment. These tools can significantly improve your development workflow and software quality.

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    Article
    Avatar of baeldungBaeldung·1y

    Implement Feature Flags in Java With Unleash

    Feature flags, or feature toggles, enable the activation and deactivation of application functionalities without altering the codebase. Unleash is an open-source tool for managing these flags across multiple environments. This guide walks through setting up Unleash locally, configuring a feature toggle, and integrating them into a Java application using Spring Boot. The setup ensures features can be toggled in real-time, improving development cycles and enabling controlled feature rollouts.

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    Article
    Avatar of jetbrainsJetBrains·1y

    9 Tips for Productive Java Development With Databases in IntelliJ IDEA

    IntelliJ IDEA enhances productivity for Java developers working with databases through features like automatic data source creation, query method testing without application runs, database schema diagrams, and in-editor query result reviews. Other helpful tools include data modification directly from result sets, query result visualization as charts, execution plan profiling, automated DB migration script generation, and an AI Assistant for query management.

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    Article
    Avatar of sitepointSitePoint·1y

    Collections in Java: A Complete Tutorial and Examples – SitePoint

    Java Collections form the backbone of efficient data management and manipulation. The tutorial covers the differences between Collections Framework and Collection Interface, using streams and lambda expressions, concurrent and immutable collections, and provides best practices for using collections. It also includes real-world use cases, language comparisons, and explains the structure and hierarchy of the framework.

  14. 14
    Article
    Avatar of foojayioFoojay.io·1y

    How JVM handles exceptions

    The JVM handles exceptions through a structured mechanism involving bytecode instructions and an exception table. When an exception is thrown, the JVM looks up the appropriate handler in the method's exception table. Handlers can be catch or finally blocks, and each handler specifies a range of instructions it covers and a target address where execution should continue. If no handler is found, the JVM looks up the call stack until it finds an appropriate handler, executing any finally blocks it encounters along the way.

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    Article
    Avatar of netguruNetguru·1y

    Java Microservices: Essential Strategies for Scalable Application Architecture

    Java microservices provide flexibility and speed for modern applications, allowing developers to create standalone services that communicate independently. Tools like Spring Boot and Spring Cloud simplify the creation and management of microservices. Java's ecosystem supports microservices with libraries for service discovery, load balancing, and fault tolerance. Key strategies for setting up Java microservices include using Spring Initializr for project setup, Docker and Kubernetes for containerization and orchestration, and tools like Eureka and Ribbon for service discovery and load balancing. Comprehensive monitoring, secure communication, and continuous deployment practices are essential for maintaining robust microservices architecture.

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    Video
    Avatar of stefanmischookStefan Mischook·1y

    Java vs C# in 2025 - Which One Would I Choose?

    The author prefers C# over Java due to its versatility. C# is seen as more flexible, especially in game development with Unity, web development using ASP.NET Core, and desktop applications on Windows. Java is strong in enterprise-level server-side applications but lacks the same level of versatility as C#, particularly in modern development scenarios. The author encourages developers to be language agnostic and choose the best tool for the task at hand.

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    Article
    Avatar of netguruNetguru·1y

    Reactive Programming Java: Revolutionizing Asynchronous Development

    Reactive programming helps Java applications become more responsive and efficient by using asynchronous processing to handle data streams without blocking. Key concepts include creating reactive systems that are resilient, elastic, and message-driven, as outlined in the Reactive Manifesto. Popular Java reactive libraries like RxJava and Project Reactor simplify working with data streams and enhance application performance. Implementing reactive programming can lead to scalable, resource-efficient applications that offer real-time data processing and better user experiences.

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    Article
    Avatar of inside_javaInside Java·1y

    A Deep Dive into JVM Start Up – Inside.java

    Explore the initialization process of the Java Virtual Machine (JVM), including its startup phases and optimizations to improve performance.

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    Article
    Avatar of infoworldInfoWorld·1y

    Why the C programming language still rules

    The C programming language, despite being developed in 1972, remains a cornerstone in software development due to its performance, bare-metal compatibility, and widespread use. It is often compared to newer languages like C++, Java, C#, Go, Rust, and Python, each of which offers unique advantages and use cases. While other languages provide higher-level features and ease of memory management, C continues to be favored for its minimalism, direct memory access, and efficiency in resource-constrained environments.

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    Article
    Avatar of baeldungBaeldung·1y

    Float vs. Double in Java

    Selecting the right numeric data type in Java is crucial for performance and accuracy. The float type is a 32-bit single-precision floating-point, making it memory-efficient and suitable for embedded systems, while the double is a 64-bit double-precision type, offering higher precision and a broader range, ideal for scientific computations and financial analyses. Developers must consider their application's needs regarding precision, memory usage, and performance when choosing between float and double.

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    Article
    Avatar of gcgitconnected·1y

    Java 23, SpringBoot 3.3.4: AI-Driven: JUnit 5, Mockito — Part 3

    Dive into advanced features of JUnit 5 and Mockito for enhancing test cases in the build pipeline. Learn about the industry preference for JUnit 5, its community support, and its integration with Spring Framework. Discover the role of various assertion libraries like Hamcrest, Google Truth, and AssertJ. Understand the importance of test automation in fast software delivery, and explore the fundamentals and usage of Mockito for creating reliable test cases in Java projects.

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    Article
    Avatar of lobstersLobsters·1y

    Why Go Should Sometimes Be a No-Go

    The author discusses challenges faced while using Go, expressing relief at switching back to Java. Go's simplicity and lack of essential features, discouragement of clean code principles, immature package ecosystem, and cumbersome error handling are highlighted as major pain points. The author advises against using Go for complex software, suggesting it is more suitable for infrastructure work.

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    Article
    Avatar of newstackThe New Stack·1y

    Introduction to Java Programming Language

    Java is a robust programming language created by Sun Microsystems and launched in 1995. It is known for its platform independence and strong performance, making it suitable for various applications including web development, mobile apps, enterprise systems, and scientific computing. Its evolution includes significant updates like generics, lambda expressions, and the module system. Java offers a sophisticated standard library, automatic memory management, and a vibrant community, ensuring continuous support and development. Commonly used in web and mobile development, Java remains crucial in modern software development landscapes.

  24. 24
    Article
    Avatar of baeldungBaeldung·1y

    A Guide to One-Time Token Login in Spring Security

    One-time token login (OTT) in Spring Boot applications helps balance ease of use and security, ideal for infrequent logins. It simplifies authentication by sending a time-limited token via email or SMS for user login instead of traditional passwords. The tutorial covers implementing OTT with Spring Boot and Spring Security, including necessary configurations, token generation, and delivery methods, concluding with manual and automated testing guidelines.

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    Article
    Avatar of netguruNetguru·1y

    Java Profiler: Essential Tool for Optimizing Application Performance

    Java profilers are essential tools for developers to identify bottlenecks, optimize code, and enhance application performance. These tools monitor memory usage, function execution times, and call frequencies, providing valuable insights into code behavior. Java profilers come in sampling and instrumentation types, each offering different levels of detail and performance impact. With tools such as Java Mission Control and Java Flight Recorder, developers can tackle performance issues efficiently, even in production environments.

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