Basic Syntax

This is a basic "Hello World!" program, which is used as an example while learning a new language.

Let us, split the code and understand it line by line.

• public class Main - defines a class named Main which is public. In Java, we have to work with classes. The Main class is the entry point for our program.
• public static void main(String[] args) - it is a special method inside main class. The execution of our code starts from main method.

1. public: access modifier written before main function shows that it is a public function which means that we can access it anywhere inside of our java program.
2. static: indicated that the method belongs to class itself.
3. void: means that the function is not returning any value.
4. main: name of the method.

• String[] args:This is the parameter to the main function which allows us to pass command line argumentsto our program when we run it.
• System.out.println("Hello World"); : This is the actual line of code which is getting executed.

1. System: buil-in class in Java.
2. out: static field with System class which represents standard output stream.
3. println("Hello World"); : This is the method call on out object. It prints text "Hello World!" on screen.

Note: We have to take care about semi-colon. We have to put semi-colon at the end of every expression.