Your First Look at Java Code
Store data in variables and let Java do the math — then build a tiny real project.
Your First Look at Java Code is a free Java Academy lesson on CoddyKit — lesson 3 of 3. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Java Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Time to see real code
Ready? Let's peek at actual Java. Don't worry about memorizing, just get a feel for it. 👀
The classic first line
Every coder's first program prints a message. In Java, one line does the talking.
Say hello
This line tells Java to show some text. Tap Run and watch it greet you! 👋
public class Main {
public static void main(String[] args) {
System.out.println("Hello, Java!");
}
}The println part
System.out.println simply means print this line. The text inside the quotes is what shows up.
Quotes mark text
Anything in double quotes is just text to display. Change the words and Java prints your version.
The main method
The main part is where Java starts running. It's the front door your program walks through. 🚪
Classes hold your code
The class wraps everything together, like a folder holding your program's pages. 📁
Try changing it
See that text? Imagine swapping it for your name. That tiny change makes the program yours.
It's a pattern
This shape repeats in Java: a class, a main, and your instructions inside. You'll see it a lot!
You did it!
You read and ran real Java code, amazing start! You've got the foundation to keep building. 🏆
Quick Check
Last one! In Java, what does System.out.println do?
Frequently asked questions
Is the “Your First Look at Java Code” lesson free?
Yes — the full text of “Your First Look at Java Code” is free to read here on the web, and the Java Academy course includes 3 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Java Academy course, upgrade to CoddyKit PRO.
What will I learn in “Your First Look at Java Code”?
Store data in variables and let Java do the math — then build a tiny real project. You practise Java Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Java Academy?
No prior experience is required. Java Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 3, so you can start here or from the beginning and move at your own pace.
How long does the “Your First Look at Java Code” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Java Academy lesson?
Yes. Every Java Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- What is Java?
- Where Java Runs
- Your First Look at Java Code