1. java-program-internal

Java Program Internal


public class ClassName {
  public static void main(String[] args) {
    // code to be executed


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


Hello, World!


The main() method is the entry point for every Java program. It is where the program starts execution. The println() method is used to print a string to the console.


This program is a basic "Hello, World!" program that demonstrates the structure and syntax of a Java program.

Important Points

  • The public keyword indicates that the class can be accessed from outside the package.
  • The static keyword indicates that the method is a class method.
  • The void keyword indicates that the method does not return a value.
  • The String[] args parameter is used to pass command line arguments to the program.


This page provides an overview of the internal structure of a Java program, including the main() method and its syntax and usage. It also includes an example program and important points to remember when writing Java programs.

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