Beginner module
Module 1: Start Coding in Java
Run Java code first, understand what the language is for, then install JDK 25 and run programs locally without getting buried in JVM internals.
Module lessons
Module 1: Start Coding in Java
Start Here: What You Can Build with Java
See what Java can do, what you will build in this course, and the simple learning loop that will take you from your first line of code to complete programs.
Run and Change Your First Java Program
Open the built-in compiler, run a working program, personalize it, and use the output to confirm exactly what your change did.
How Your First Java Program Works
Understand the four parts of the program you just ran: the class, the `main` method, braces, and the statement that prints output.
Install JDK 25 and Verify `java` and `javac`
Install a current Java 25 JDK, verify the runtime and compiler from the terminal, and avoid outdated JRE-only advice.
Run a Java File from Terminal and from an IDE
Compile and run a simple Java file locally, then see how an IDE does the same job with less manual typing.
Common Setup Mistakes and Quick Fixes
Recognize the first errors beginners hit most often and fix them without panic.
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