How to Install Java JDK and Set Environment Variables

For anyone venturing into the world of computer programming, getting familiar with Java is a must. It’s one of the most popular programming languages due to its versatility and ubiquity. To start coding and executing in Java, you would require Java Development Kit (JDK). This article will guide you on how to install Java JDK and set environment variables to run your Java code successfully.

What is Java JDK?

JDK, also known as Java Development Kit, is a software development environment used for developing Java applications and applets. It includes the Java Runtime Environment (JRE), an interpreter (java), a compiler (javac), an archiver (jar), a document generator (javadoc) and other tools needed for Java development. It’s a package that provides the environment to develop, execute, and debug the Java program.

Step-By-Step Guide to Install Java JDK

Let’s get started with downloading and installing Java JDK.

1. Start by visiting the official Oracle website. Look for the latest version of Java JDK and download it. The JDK package is available for all major operating systems. Make sure to choose the one that matches your operating system architecture (32-bit or 64-bit).

2. Begin the installation by double-clicking the downloaded file. A setup wizard will guide you through the process. Follow the instructions on the wizard; agree to the license terms and choose the installation path (if you want anything other than the default location).

3. Once you have successfully installed the JDK, you can verify the installation. Open a command prompt and type: java -version. If the installation was successful, it will display the version of the Java you have installed.

Impressive! You’ve now installed Java JDK on your system.

Setting Up Environment Variables

The next critical step after installing JDK is to set up environment variables. This step will tell your system where JDK was installed and where to look for it when running Java programs.

Here is how to set environment variables:

1. Right-click on the Computer icon (or My Computer) on your desktop or in the Start Menu, select Properties.

2. Once in the System Properties panel, select "Advanced system settings."

3. In the resulting dialog box, click on "Environment Variables."

4. In the System variables section, click "New" then provide the following details in the respective fields: Variable name as 'JAVA_HOME' and Variable value as the path to your JDK installation (e.g., 'C:\Program Files\Java\jdk_version').

5. Next, locate the “Path” variable under the System Variables section. Click on 'Edit,' then append the path to the bin folder in your installed JDK directory to the existing ‘Path’ value, it would look something like this: '%JAVA_HOME%\bin.'

6. Once you’ve done this, click 'OK' to exit all dialog boxes.

You've successfully set JDK Environment Variable on your system. It will help your system to compile and execute Java code.

Remember, every time you update your JDK, you need to update this path as well.

That’s it! Congratulations on the successful installation of Java JDK and setting up environment variables on your system. Ready to start coding in Java? Happy programming!