Java Architecture & The First Program
Understand the JVM, JDK, bytecode compilation, and the anatomy of a Java class.
Write Once, Run Anywhere (WORA)
Java compiles source code (.java) into platform-independent Bytecode (.class) executed by the Java Virtual Machine (JVM).
Hands-On Code Examples & Sandbox
1 ExampleKey Concepts • Chapter 01
- •Every Java program must have at least one class matching the filename.
- •public static void main(String[] args) is the mandatory entry point.
- •System.out.println() prints lines to standard output.
🎯 Chapter Practice Challenge
Declare an int studentBatch = 2026 and print it to the console.
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