Java Installation and "Hello World" Program Guide

Introduction

• Welcome message and Happy New Year.
• Purpose of the video: Install Java and run a simple "Hello World" program on Windows OS.
• Encouragement to comment for help and subscribe to related channels:
  • Geeky Syntax (programming and coding videos)
  • Geeky Script Vlogging Channel

Installing Java

1. Search for JDK
   • Type "jdk download" in the search bar.
   • Open the link to the official Oracle site (link in description).
2. Download Java JDK
   • Select the appropriate version (e.g., JDK 21).
   • For Windows, download the x64 MSI Installer.
3. Install Java
   • Double-click the downloaded file to launch the installation wizard.
   • Follow the prompts (Next, Yes) to install in the default directory (C:\Program Files\Java\jdk21).
   • Installation may take a few minutes.

Setting Environment Variables

1. Locate JDK Installation
   • Navigate to C:\Program Files\Java\jdk21\bin and copy the path.
2. Edit System Environment Variables
   • Search for "environment" and select "Edit the system environment variables".
   • Click on the "Environment Variables" button.
   • Edit the "Path" variable:
     • Click on New and paste the copied path.
   • Set JAVA_HOME variable:
     • Variable name: JAVA_HOME
     • Variable value: C:\Program Files\Java\jdk21 (without \bin).

Verifying Installation

• Open Command Prompt and type java --version.
• Successful installation will show the installed Java version.

Creating a "Hello World" Program

1. Create a New Folder
   • Name it Java Practice.
2. Create a New Java File
   • Create a new text document and rename it to HelloWorld.java.
   • Enable file name extensions if not visible by going to View > Show > File name extensions.
3. Write Java Code
   • Open HelloWorld.java in Notepad and enter code: class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } }
   • Save the file.
4. Compile and Run the Program
   • In the Java Practice folder, open Command Prompt and compile using javac HelloWorld.java.
   • Run the program with java HelloWorld to see the output in the console.

Recommendations

• Install IntelliJ IDEA for a better programming environment with a graphical user interface.

Conclusion

• Encourage viewers to like, share, and subscribe to both Geeky Script and Geeky Syntax channels.
• Thank the audience and provide well wishes.