Java is a high-level programming language originally developed by Sun Microsystems and released in 1995. Java runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX.

NOTE: The class and and file name should be same while writing JAVA program. please make a note that in case you do not have a public class present in the file then file name can be different than class name. It is also not mandatory to have a public class in the file.

My First Program in Java:

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

}

Output:

Hello World!!!!!

Explanation:

1. public class HelloWorld
   • Class definition:This line uses the keyword class to declare that a new class is being defined.
2. public static void main(String[] args)
   • main method: In Java programming language, every application must contain a main method.
   • public: So that JVM can execute the method from anywhere.
   • static: Main method is to be called without object. The modifiers public and static can be written in either order.
   • void: The main method doesn’t return anything.
   • main(): Name configured in the JVM.
   • String[]: The main method accepts a single argument an array of elements of type String.
3. System.out.println("Hello World!!!!!");
   • This line outputs the string “Hello World!!!!!” followed by a new line on the screen. Output is actually accomplished by the built-in println() method. System is a predefined class that provides access to the system, and out is the variable of type output stream that is connected to the console.