Lesson 1 – Introduction to Java

Java is one of the most popular programming languages in the world. It is used in web applications, desktop software, Android mobile apps, games, and large enterprise systems.

Why Learn Java?

Highly demanded in the job market
Used by Google, Amazon, Netflix, and many industries
Object-Oriented (OOP), making large projects easy to manage
Cross-platform: runs on Windows, Mac, Linux through the JVM
Very powerful for Android app development

Your First Java Program

Here is the simplest Java program you can write:

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

Explanation:

public class Main → every program must be inside a class
main() → this is where the program starts running
System.out.println() → prints text to the screen

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