Java Getting Started

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Java Getting Started 

You can begin learning Java instantly without installing any software. Many online platforms provide a browser-based Java compiler where you can write code and view the output at the same time. This makes it easy for beginners to experiment and understand Java basics quickly.

An online Java editor allows you to:

• Write Java programs directly in your browser 
• Compile and execute code instantly 
• View results without setup

Sample Online Java Program

public class Greeting { 

    public static void main(String[] args) { 

        System.out.println("Welcome to Java Programming!"); 

    } 

} 

Output

Welcome to Java Programming! 

This type of editor will be used throughout tutorials to explain Java concepts with live examples.

Installing Java on Your Computer 

If you prefer running Java programs on your own system, you’ll need to install Java locally.

Check If Java Is Already Installed (Windows)

Some computers already have Java installed. To verify:

1. Open Command Prompt (cmd) 
2. Type the following command and press Enter: java -version

If Java is available, version details will be displayed, such as the installed Java runtime and build information. If Java is not installed, you can download the latest version from the official Oracle website.

Note on Java Editors and IDEs 

In this tutorial, Java programs will be written using a simple text editor to help you understand the fundamentals clearly. However, professional developers often use Integrated Development Environments (IDEs) like:

• IntelliJ IDEA 
• Eclipse 
• NetBeans  

These tools are especially helpful for managing large Java projects.

Java Quick Start Guide

Every Java program starts with a class, and the class name must be the same as the filename.

Let’s create a simple Java file named App.java using any text editor.

App.java 

public class App { 

    public static void main(String[] args) { 

        int year = 2026; 

        System.out.println("Learning Java in " + year); 

    } 

}

Don’t worry if the code looks confusing right now—you’ll understand each part step by step in later lessons.

Compiling and Running the Program

1. Save the file as App.java 
2. Open Command Prompt 
3. Navigate to the folder where the file is saved 
4. Compile the program using: javac App.java                                                                                         If there are no errors, the program will compile successfully. 
5. Run the program using: java App

Output 

Learning Java in 2026

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