java core

Ahead-of-Time (AOT) and Just-in-Time (JIT) compilation are strategies for improving Java application performance.In earlier Java versions, experimental AOT and JIT compilers were introduced to explore new optimization techniques.However, starting from Java 17, these experimental features have been removed to simplify the JDK, reduce maintenance costs, and focus on proven, production-ready technologies. What Were the Experimental […]

In earlier Java versions, Remote Method Invocation (RMI) allowed distributed communication by enabling objects to call methods across JVMs.An important extension to RMI was the RMI Activation system, introduced to activate remote objects on demand, reducing memory and resource usage. However, as technology evolved, Java 17 deprecated RMI Activation because it became outdated, complex, and

Random number generation is a fundamental requirement in many software applications — from gaming, simulations, and modeling to cryptography and security.Before Java 17, developers mostly used java.util.Random or java.security.SecureRandom classes for random number generation. However, these traditional generators had limitations such as low randomness quality, limited algorithm choice, and lack of parallel stream support. To

Concurrent collections are specialized data structures in programming that facilitate safe and efficient manipulation of shared data by multiple threads in a concurrent environment. Traditional collections, like lists, queues, or maps, often face issues like race conditions when accessed by multiple threads simultaneously. Concurrent collections address these issues by providing built-in thread-safe operations. Concurrent collections

Java 17 enhances pattern matching for switch statements and expressions, building on features introduced in earlier versions. It introduces sealed classes and pattern matching to make switch constructs more expressive and concise. Below is a detailed explanation of pattern matching in switch as of Java 17, including examples. Important Features of Pattern Matching for switch

Sealed classes are a feature introduced in JEP 409 (part of Java 15 as a preview, finalized in Java 17) to provide more control over class inheritance. They allow a class to restrict which classes or interfaces can extend or implement it, enabling more robust and maintainable hierarchies. Important Concepts of Sealed Classes    

Additional Java EE Modules Removed from Java 11 Java 11 continued the trend of removing Java EE (Enterprise Edition) modules from the JDK, which started in earlier versions (like Java 9 and Java 10). This was a significant shift in Java’s ecosystem as it marked the end of the official inclusion of Java EE technologies

Java 11, released in September 2018, brought a number of improvements and enhancements to the language and platform. One of the notable changes was the enhanced deprecation mechanism, which aims to improve how deprecated features are handled in Java. Deprecation in Java is a way for developers to mark certain features or APIs as outdated

Time-Based Release Versioning in Java 11 Java 11 introduced a major change in how Java versions are released, moving to a time-based release versioning system. This means that instead of waiting for major new features to be ready, Java now follows a fixed release schedule, where new versions of Java are released every six months.

In modern software applications, especially large and long-running Java programs, memory management is critical.Poor memory usage can lead to performance degradation, OutOfMemoryErrors, and even application crashes.Heap profiling — the process of analyzing memory usage patterns — helps developers understand, optimize, and debug how memory is allocated and used. However, traditional heap profiling tools often introduce