Setting Up Java Environment

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Chapter 2: Setting Up Java Environment

Chapter 2: Setting Up Java Environment

Setting up your Java programming environment is the first step toward writing, compiling, and executing Java programs. This chapter will walk you through installing the Java Development Kit (JDK), setting up environment variables, and using popular IDEs like Eclipse or IntelliJ IDEA.

🔧 Step 1: Install the Java Development Kit (JDK)

  • Go to the official Oracle JDK download page: Download JDK
  • Choose the version compatible with your OS (Windows, macOS, or Linux).
  • Download and install the JDK by following the installation wizard.

Verify the Installation

java -version
javac -version

If the versions are displayed, the installation is successful.

🛠️ Step 2: Set Up Environment Variables (Windows)

  1. Right-click on “This PC” → Properties → Advanced System Settings → Environment Variables.
  2. Under System Variables, find Path, then click Edit.
  3. Add the path to the bin folder of the JDK. Example: C:\Program Files\Java\jdk-XX\bin
  4. Click OK to save and exit.

💻 Step 3: Choose and Install an IDE

1. Eclipse IDE

  • Website: eclipse.org
  • Lightweight and widely used for Java development.

2. IntelliJ IDEA

  • Website: jetbrains.com/idea
  • Offers smart coding assistance, GUI builder, and powerful debugging tools.

🚀 First Java Program

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

To Compile and Run:

javac HelloWorld.java
java HelloWorld

🎯 Summary

  • Installed JDK and set environment variables.
  • Installed an IDE for Java development.
  • Compiled and ran the first Java program.

❓ FAQs with Answers

Q1: What is the JDK?

A: The JDK (Java Development Kit) is a software development kit used to develop Java applications. It includes the JRE and development tools like the compiler (javac).

Q2: Do I need to install an IDE to code in Java?

A: No, an IDE is optional. You can write Java programs using any text editor like Notepad or VSCode and compile them using the command line.

Q3: How do I check if Java is installed correctly?

A: Open Command Prompt and type java -version and javac -version

📌 Related Links: Complete Java Course

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