DEV Community: Iyappan G

What is JRE 🤔?

Iyappan G — Sat, 12 Apr 2025 15:35:42 +0000

JRE-JRE is an java runtime environment,its an part of the JDK provides need to run the java programs.

like an Key components:

*JVM-its can run the java byte code.

Simple terms in JRE:

*JRE is an computer to need an run the java application,which does not to comile OR Write.

*java class libraries-its an prebuild classes to use (like that java.lang (or) java.until etc.....).

*java class Loaders-like that memory needed into loads java.

TOOLS - PURPOSE

JVM - Runs the java byte code.

JRE - JVM including with libraries to run the java apps.

JDK - JRE includinng with tools to write OR compile and debug the java code.

DAY 2 -JAVA

Iyappan G — Tue, 25 Mar 2025 16:20:23 +0000

WHAT IS A JOR FILE?

A JAR file allows Java runtimes to efficiently deploy an entire application, including its classes and their associated resources, in a single request.

WHAT IS CLASS?

Class is an group of object,but we called as blueprint or template.

PROGRAM:

   public class Sports
   {
   public static void main(String[] args)
   {
      System.out.println("welcome to sports meet");
    }
    }

In above the program today i get the some error:

statement error-{"welcome to sports meet)

symbol error-(string[] args)

OUTPUT:

welcome to sports meet

OOPS DIAGRAM:

JAVA INTRODUCTION-DAY 1

Iyappan G — Mon, 24 Mar 2025 16:05:51 +0000

HISTORY OF JAVA:
> Began in 1991 at Sun Microsystems, with James Gosling leading a team to create a language for consumer electronics.

DEFINE JAVA:
> Java is a widely used, high-level, object-oriented programming language and software platform.
> Java code can run on any platform with a Java Virtual Machine (JVM).

FEATURES OF JAVA:

ARCHITECTURE OF JAVA:

TWO PROCESSES IN JAVA:

COMPILER.

2.INTERPRETAR.

The Java source code goes to the compiler.
The Java Compiler converts into byte codes.
The bytes codes are then converted into machine by the JVM
The Machine code is executed directly by the machine(Operating System).

COMPONENTS OF JAVA ARCHITECTURE:

JRE — Java Runtime Environment.
JDK — Java Development Kit.
JVM — Java Virtual Machine.

DAY4-GIT BRANCH,STASH.

Iyappan G — Fri, 21 Mar 2025 13:17:49 +0000

GIT BRANCH:

GIT ADD:

GIT MERGE:

GIT REBASE:

GIT CHERRY PIC:

GIT STASH:

GIT LAB DAY2

Iyappan G — Thu, 20 Mar 2025 03:40:27 +0000

How to push git step by step?

Git clone from the git repository you need to push to...

2.copy the content of the cloned repository into the local directory.

3.command into your local directory and run git remote -v.

4.Git add-A to add whatever change you require and commit it.

5.Finally git push.

GIT?

Iyappan G — Tue, 18 Mar 2025 14:03:32 +0000

what is git?

   1. Git is a powerful version control system.

   2. To track changes in code, collaborate on projects, and manage different versions of software.

   3. It allows for branching, merging, and reverting.

vcs[version control system]:

 *It is an software configuration management or source code managemnet.

 Types:
     *CVS(centralized version control system).
     *DCVS(decentralized version control system).