Setting Up Java Development Environment

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Before you can cook a meal, you need a kitchen with the right tools like a stove, a pot, and ingredients.

Similarly, before you can write and run Java programs, you need to set up your Java development environment a few tools that help you write, check, and run your Java code.

What Do You Need to Start Coding in Java?

To write and run Java programs, you need 3 main things:

1. JDK (Java Development Kit): This is the toolkit that allows you to write and run Java programs. It includes:

  • A compiler (turns your code into bytecode)
  • The JVM (runs the bytecode)
  • Other tools to help with development

2. An IDE (Integrated Development Environment): This is a software application where you can write your Java programs. It helps you:

  • Type and format your code
  • Highlight errors
  • Run your program with just a click

Some beginner-friendly IDEs:

  • IntelliJ IDEA (very popular and beginner-friendly)
  • Eclipse
  • BlueJ (great for absolute beginners)
  • NetBeans

You can also use a simple text editor like Notepad, but an IDE makes things much easier.

3. A Computer (Windows, Mac, or Linux): Java works on all major operating systems. Just install the tools and you’re ready!

How to Set It All Up (Step by Step):

Step 1: Download and Install the JDK

  • Visit the official Oracle Java website (or use OpenJDK)
  • Download the version for your system (Windows/Mac/Linux)
  • Install it like any other software

Step 2: Download and Install an IDE

  • For beginners, IntelliJ IDEA (Community Edition) is a great choice
  • Install it, open it, and create a new Java project

Step 3: Write Your First Java Program

Here’s a simple Java program:

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, world!");
    }
}

Step 4: Run the Program: In the IDE, just click Run

You’ll see the output:

Hello, world!

Congratulations — you just wrote and ran your first Java program!

Coming Up Next

Now that everything is set up, let’s learn about the basic structure of a Java program what all those words in your first program actually mean.

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