How to Compile and Run Java Program from Command Prompt

In this video, we'll walk you through the process of running a Java program from the command prompt on your computer.

In the previous tutorial, we learned how to write a simple Java program using Eclipse IDE, where we could easily run the program by clicking the "Run" button. However, in this tutorial, we’ll dive into how you can execute your Java program directly from the command prompt by typing commands.

The first thing you'll need is to download and install the Java Development Kit (JDK) on your system and set the correct environment path variable. If you're not sure how to do this, I’ve created a separate video that walks you through the process, so check that out!

Once your system is ready, we’ll start by writing the Java code. I’ll be using Notepad++ to write the code, but you can use any text editor of your choice. We’ll create a simple class called Hello with a main method that prints "Hey YouTube" to the screen.

You’ll learn how to save the Java file with the correct extension (.java), then move to the command prompt where we’ll compile the code using the javac command. The compilation converts our Java code into bytecode, and we’ll execute it with the java command to get the output.

By the end of this tutorial, you’ll understand the steps involved in compiling and running a Java program from the command prompt.

Key Steps Covered:
Writing a basic Java program in a text editor.
Saving the file with the correct .java extension.
Compiling the program using the javac command.
Running the compiled .class file using the java command.
Understanding how the Java compilation and execution process works.

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