Now, open the Command Prompt and run it as administrator. We will make use of the ‘cd’ command to change the operating directory on the Command Prompt to the one where your Java program is stored.

Simple Java Program public class FirstJavaProgram {public static void main (String [] args){System. out. println ("This is my first program in java");} //End of main} //End of FirstJavaProgram Class.

Compile the Java program with the javac command as shown below. Be warned that you won’t see anything happen. However, if you use the dir command, you’ll notice a new file in your directory ending in ...

`javac filename.java` This command will generate a file called `filename.class` in the same directory. Step 3: Run the Java program. Now, you are ready to run the Java program from the command prompt.