public class HelloWorld {

public static void main (String[] args) {

System.out.print("Hello World!");

}

}

When the JVM starts running, it looks for the class you give it at the command-line. Then it starts looking for a specifically-written method.

Next, the JVM runs everything between the curly braces {} of the main method. Every Java application must have at least one class, and at least one main method.

• public: It is an access modifier. It defines the circumstances under which a class can be accessed. Here public means that everybody can access it.
• class: is the keyword to identify a class.
• HelloWorld: is the name of the class.
• {: opening curly brace of the class
• public: starts of the method accessible by everybody.
• static: means this method works without instantiating an object of the class.
• void: is the method's return type. It returns nothing.
• main: is the name of this method.
• String: is a class. Any arguments to this method must be String objects.
• []: the suqre brackets mean the argument to this argument is an array of Strings.
• args: is the identifier of the array of Strings that is the argument to this method.
• {: opening curly brace of the method.
• System.out.print: print to standard output (defaults to command-line).
• ("Hello World!"): is the string you want to print.
• ;: every statement must end in a semicolon.
• }: closing brace of the main method.
• }: closing brace of the Hello class.