Introduction to Java and SDK

Java is one of the most widely used programming languages, known for its platform independence and versatility in building applications across various domains. To start developing Java applications, the Java Development Kit (JDK) is required. JDK is part of the Software Development Kit (SDK), which provides necessary tools, including the Java compiler and runtime environment.

Unlike IDEs such as NetBeans and IntelliJ, which bundle Java support natively, setting up Java in Visual Studio Code (VS Code) requires manual installation and configuration. This guide walks through the step-by-step process of installing JDK on Windows and configuring it in VS Code.

Downloading and Installing JDK

To begin, the JDK must be installed on your system. Visit the official Oracle website or use the provided link to navigate to the JDK download page, ensuring that the correct version for Windows is selected.

Once on the download page, choose the x64 Installer file, as this is the recommended version for most users. After downloading the installer, open the .exe file and begin the installation process by clicking Next.

Follow the on-screen instructions to complete the installation.

By default, JDK is installed in C:\Program Files\Java\jdk-21. To confirm the installation, open File Explorer and navigate to this directory

Configuring Environment Variables

After installing the JDK, the next step is to configure Environment Variables to ensure Java can be accessed from the command line.

Open File Explorer and go to the JDK installation directory. Inside the JDK folder, enter the bin directory where Java executables are stored.

Click on the address bar, copy the full path, and keep it handy for later use.

Next, open the Start Menu, type env., and select Edit the system environment variables.

In the System Properties window, click on Environment Variables to proceed.

Under the System Variables section, locate and select Path, then click Edit

In the Edit Environment Variables window, click New and paste the previously copied JDK bin path.

Click OK in all the open windows to save the changes.

Verifying Java Installation

Once the environment variables have been set, it is important to verify whether Java is installed correctly. Open Command Prompt (cmd) and type java --version, then press Enter. If the installation was successful, an output displaying the installed Java version should appear.

If the output does not match expectations, double-check the Environment Variables configuration to ensure that the correct path has been added.

Testing a Java Program

After configuring Java, test it by opening Visual Studio Code, creating a new file, and writing a simple Java program. Run it using the Run button in the top right.

If the terminal shows the expected output, Java is ready to use.

Tips for Enhancing Java Development in VS Code

For an improved development experience, consider installing the Java Extension Pack from the Extensions Marketplace. This extension provides additional features such as IntelliSense, debugging, and build tools, making Java development more efficient. However, this is optional and not required to run basic Java programs

Conclusion

Installing and running Java on Windows using VS Code involves downloading the JDK, configuring environment variables, and verifying the installation. Once these steps are completed, Java programs can be executed seamlessly. For those who want enhanced features, the Java Extension Pack can be installed, but it is not necessary for basic execution.

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