java_development_kit_vs-Java_virtual_machine-vs_java_development_kit

java_development_kit_vs-Java_virtual_machine-vs_java_development_kit

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  Features of Javaand JDK Anthoniraj Amalanathan 1
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  Features of Java Simple:Easy to learn and use. Java avoids complex features like pointers and operator overloading. Object-Oriented: Everything in Java is represented as objects. It supports core OOP principles: encapsulation, inheritance, and polymorphism. Platform Independent: Java code is compiled into bytecode which runs on any system with a Java Virtual Machine (JVM). Secure: Java provides a secure environment with no direct memory access and has built-in security features. Robust: Java handles runtime errors using exception handling and automatic memory management (garbage collection). 2
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  Features of Java Multithreaded:Java supports multithreading, allowing concurrent execution of two or more parts of a program. Architecture Neutral: Java uses a fixed-size data type system so programs behave consistently across different platforms. Portable: Java programs can be moved easily from one system to another because of platform independence and consistent bytecode behavior. Distributed: Java provides APIs like java.net and RMI for building applications that can interact over a network. 3
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  JVM – JavaVirtual Machine Definition: JVM is the engine that actually runs Java programs. Responsibility: Executes .class files (compiled bytecode). Platform Dependent: Each OS has its own JVM implementation. 4
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  JRE – JavaRuntime Environment Definition: A software package that provides the environment to run Java programs. Includes: JVM Core Java libraries (rt.jar) Supporting files Usage: End-users install JRE to run Java applications, not to develop. 5
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  JDK – JavaDevelopment Kit Definition: A complete software development kit to develop Java applications. Includes: JRE (which includes JVM) Development tools: javac , javadoc , jdb , etc. Usage: Developers install JDK to write, compile, and run Java code. 6
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  Visual Diagram 7
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  Popular JDK Distributions(2025) JDK Name Maintained By Notes Oracle JDK Oracle Official but licensed OpenJDK OpenJDK Community Reference implementation Eclipse Temurin Adoptium Foundation Enterprise-grade & free Amazon Corretto AWS Free, cloud-optimized Zulu by Azul Azul Systems Embedded & IoT support Liberica JDK BellSoft JavaFX support included 8
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  JVM-Based Languages The JVMcan run many languages, not just Java: Language Description Kotlin Modern, concise; official Android language Scala Functional + OO programming Groovy Dynamic scripting for Java Clojure Functional Lisp dialect JRuby Ruby implementation on JVM Jython Python implementation on JVM Golo Lightweight language for IoT 9