Java Program to print Hello World

In this program, we will create a simple Java application to display the message "Hello World!!!" on the console.

Program

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello World!!!");
    }
}

Explanation of the Program

Let us break the program into its key components for better understanding:

1. public class HelloWorld:

   • Every Java program begins with a class definition.
   • Here, the class is named HelloWorld. The class name must match the file name (HelloWorld.java).

2. public static void main(String[] args):

   • This is the entry point for any Java program.
   • public: Makes the method accessible globally.
   • static: Allows the method to be called without creating an object of the class.
   • void: Indicates that this method does not return any value.
   • String[] args: Accepts command-line arguments as an array of strings.

3. System.out.println("Hello World!!!");:

   • System.out: Refers to the standard output stream.
   • println: Prints the string inside the parentheses and moves the cursor to the next line.
   • The string "Hello World!!!" is displayed on the console.

Output

When you run this program, the following output will appear on the console:

Hello World!!!

This is the simplest Java program, and it's often the first program written when learning a new programming language.