Skip to main content

What is JDK, JRE and JVM?

Image result for jdk jre jvm images


What are JDK, JRE, and JVM:


JDK:- Java Development Kit (in short JDK) is Kit which provides the environment to Develop and execute(run ) the Java program. For eg. You(as Java Developer) are developing an accounting application on your machine, so what do you going to need into your machine to develop and run this desktop app? You are going to need J-D-K for that purpose for this you just need to go to the official website of sun or oracle to download the latest version of JDK into your machine.
Hence, JDK is a kit(or package) which includes two things i) Development Tools(to provide an environment to develop your java programs) and ii) JRE (to execute your java program). JDK is only used by Java Developers.
JRE:- Java Runtime Environment (to say JRE) is an installation package which provides an environment to only run(not develop) the java program(or application)onto your machine. For eg(continuing with the same example) after developing your accounting application, you want to run this application into your client’s machine. Now, in this case, your client only need to run your application into his/her machine so your client should install JRE in-order to run your application into his machine.
Hence, JRE is only used by them who only wants to run the Java Programs i.e. end-users of your system.
JVM:- Java Virtual machine(JVM) is a very important part of both JDK and JRE because it is contained or inbuilt in both. Whatever java program you run using JRE or JDK goes into JVM and JVM is responsible to execute the java program line by line hence it is also known as interpreter(we will discuss interpreter later). Hence you don’t need to install JVM separately into your machine because it is inbuilt into your JDK or JRE installation package.

Comments

Post a Comment

Popular posts from this blog

java Interview Goal

                                                  Hi All,         I write this blog for Fresher  And  Experience  who have start Career In IT_Industry With  java Technology, I am not a professional blogger, I am  working  as Java Developer since last 2 years,   The main reason to write this blog is to share my Experience In Interviews. ABOUT THE AUTHOR           Nice to meet you, I’m Akshay Ingole. I’m a not a professional blogger ,  I am  working  as Java Developer since last 2 years,   The main reason to write this blog is to share my Experience In Interviews as well as share the topics that trending in java.   I hope It is Useful For All. 
7 comments
Read more

Understanding DeepSeek: A New Player in AI

DeepSeek is a Chinese artificial intelligence (AI) company founded in 2023, dedicated to advancing artificial general intelligence (AGI). Their flagship model, DeepSeek-R1, launched in January 2025, is an open-weight AI model designed to perform complex reasoning tasks, including solving scientific problems.  How DeepSeek Works DeepSeek-R1 operates as a reasoning model, capable of autonomous exploration and information synthesis. It can navigate the web, select pertinent information, and compile detailed reports, automating tasks typically handled by humans. This functionality positions DeepSeek-R1 as a versatile tool for various applications, from research to customer service.  DeepSeek's Impact on the AI Landscape DeepSeek's emergence has disrupted the AI sector, challenging established models like OpenAI's ChatGPT. Its open-weight approach and cost-effective development have made advanced AI capabilities more accessible. Chinese companies and government agencies have rap...
1 comment
Read more

Ace Your Java Interview: Top 50 Java Interview Questions & Answers (2025)

  Introduction Java continues to be a top programming language in 2025 , widely used in enterprise applications, microservices, cloud computing, and AI-based systems . If you're preparing for a Java developer interview , you must be well-versed in Core Java, Java 8-21 features, Spring Boot, Microservices, and Cloud technologies . This guide covers the top 50 Java interview questions for freshers and experienced professionals , ensuring you are ready for your next interview! Table of Contents Core Java Interview Questions Java 8, Java 11, and Java 21 Features OOP and Design Patterns Multithreading and Concurrency JVM, Garbage Collection & Memory Management Collections Framework Spring Boot & Microservices Cloud Technologies (AWS, Azure, GCP) Real-World Java Interview Scenarios 1. Core Java Interview Questions Q1: What are the key features of Java? Answer: Platform Independence – Java runs on JVM , making it OS-independent. Object-Oriented – Java follows...
Post a Comment
Read more