Hello World Program

public class Main {
  public static void main(String[] args) {
    // code here
  }
}

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

• 1 public class defines the class.
• 2 main() is the entry point of Java execution.
• 3 System.out.println prints output to console.
• 4 Every statement ends with a semicolon.

• 1 Open any IDE or text editor.
• 2 Create a file named Main.java.
• 3 Write the Hello World program.
• 4 Save the file properly.

• 1 Open terminal or command prompt.
• 2 Navigate to file location.
• 3 Run javac Main.java command.
• 4 This generates bytecode (.class file).

• 1 Run using java Main command.
• 2 JVM executes the bytecode.
• 3 Output is displayed on console.
• 4 Program runs successfully.

• 1 Java is case-sensitive.
• 2 Class name must match filename.
• 3 main() method is required.
• 4 Curly braces define code blocks.

• 1 Introduces Java programming basics.
• 2 Explains compilation and execution flow.
• 3 Builds confidence for beginners.
• 4 Foundation for all Java learning.