Courses/Java Fundamentals & Object-Oriented Programming
BEGINNER Track•Java 21

Java Fundamentals & Object-Oriented Programming

Zero to Hero: Master core programming concepts and Java 21 from first principles.

Modules8
Lessons28
Quizzes6
Free Previews3 Free

Course Overview

Designed specifically for complete beginners, college students, and career switchers. Learn computational thinking, variables, methods, object-oriented design, arrays, exception handling, and build real runnable projects with clean code practices.

What You Will Master

• Understand how computer memory, compilers, and JVM execution work. • Write structured, bug-free Java programs using variables, conditionals, and loops. • Design reusable classes, encapsulation, inheritance, polymorphism, and interfaces. • Catch runtime exceptions gracefully and manipulate arrays, Strings, and collections. • Build an interactive Bank Account Management CLI & transaction ledger project.

Prerequisites

No prior programming experience required. Basic familiarity with using a computer and text editor is all you need.

Full Course Syllabus

Every module and lesson topic is visible upfront. Open free sample lessons immediately.

1.1 How Programming Works & The JVM Architecture

Discover what happens behind the scenes when a computer runs instructions, and why Java's 'Write Once, Run Anywhere' model transformed modern software.

1.2 Anatomy of Hello World & Java Syntax

Deconstruct every single word in Java's classic Hello World program and establish solid coding conventions.

1.3 JDK 21 Setup, Modern Tooling & Running Programs

Configure your local development environment with JDK 21 LTS, understand JAVA_HOME and PATH, and learn how Java 21 runs single-file source code directly.

2.1 Variables, Primitive Data Types & Memory Bit Sizes

Deep dive into Java's 8 primitive data types, their exact byte footprints in RAM, and how to choose the right type.

2.2 Type Casting: Widening vs Narrowing & Overflow Hazards

Understand implicit type promotion, explicit manual casting, and how integer overflow can silently corrupt financial calculations.

2.3 Arithmetic, Relational, Logical & Compound Operators

Master operator precedence, short-circuit logical operators, and avoid subtle bugs in Boolean arithmetic.

2.4 Interactive Console I/O: Scanner & Formatted Output

Read user inputs from standard input using Scanner and generate formatted reports using System.out.printf.

Module 2 Checkpoint: Primitives, Casting & Operators
Checkpoint Quiz
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