Lecture on Printing in Java

Introduction

• Topic: Printing in Java.
• Example Program: Traditional "Hello World" program.

Key Concepts

Basic Printing Command

• Command: System.out.println
  • Syntax: System.out.println("Hello, World!");
  • Explanation:
    • System with a capital 'S'
    • .out.println method
    • Text to print inside parentheses and quotes
    • End with a semicolon

Custom Messages

• Replace "Hello, World!" with any string to print different messages.
  • Example: System.out.println("Woohoo!");

Writing the Program

Extending ConsoleProgram

• Instead of extending Karel, extend ConsoleProgram in Java.
  • Class Declaration: public class HelloWorld extends ConsoleProgram

Structure of the Program

1. Class Declaration: public class HelloWorld extends ConsoleProgram
2. Run Method:
   • public void run()
   • Use curly brackets {} to define the method body.
3. Printing Statements:
   • System.out.println(