Java Example

public class Simple{  

    public static void main(String args[]){  

     System.out.println("Hello Makkena Srinivasa Rao");  

    }  

}  
Java Example

public class Simple{

In Java, every line of code that can actually run needs to be inside a class. This line declares a class named Simple, which is public, that means that any other class can access it. Notice that when we declare a public class, we must declare it inside a file with the same name (Simple.java), otherwise we'll get an error when compiling.

public static void main(String[] args) {

This is the entry point of our Java program. the main method has to have this exact signature in order to run our program.

public again means that anyone can access it.

static means that you can run this method without creating an instance of Main.

void means that this method doesn't return any value.

main is the name of the method.

The arguments we get inside the method are the arguments that we will get when running the program with parameters. It's an array of strings. We will use it in our next lesson, so don't worry if you don't understand it all now.

System.out.println ("Hello Makkena Srinivasa Rao");

System is a pre-defined class that Java provides us and it holds some useful methods and variables.

out is a static variable within System that represents the output of your program (stdout).

println is a method of out that can be used to print a line.