Java Roadmap - Beginner

Follow this step-by-step roadmap to master java at Beginner level

1

Introduction to Java

1-2 weeks

▹What is Java? History & Features (Platform Independent, OOPs)
▹Java's Philosophy: WORA (Write Once, Run Anywhere)
▹Java Ecosystem (JDK, JRE, JVM)
▹Java Versions (LTS vs Latest)
▹Install Java & IDE Setup (IntelliJ, Eclipse, VS Code)
▹Hello World Program: Your First Java Code
▹Java Program Structure (Class, main method)
▹Understanding `System.out.println()`
▹Compiling & Running Java Programs (from IDE and command line)
▹Comments & Code Style (Best Practices)

2

Data Types, Variables & Input/Output

2 weeks

▹Primitive Data Types (int, float, double, char, boolean, byte, short, long)
▹Non-Primitive/Reference Data Types (String, Arrays, Classes)
▹Variables & Constants (final keyword)
▹Naming Conventions
▹Type Casting (Implicit & Explicit)
▹Wrapper Classes (Integer, Double, Boolean)
▹String Class & Common String Methods
▹Taking User Input (Scanner Class)

3

Operators & Expressions

1 week

▹Arithmetic Operators (+, -, *, /, %)
▹Comparison/Relational Operators (==, !=, >, <, >=, <=)
▹Logical Operators (&&, ||, !)
▹Bitwise Operators (&, |, ^, ~, <<, >>)
▹Assignment Operators (=, +=, -=, *=, /=)
▹Unary Operators (++, --)
▹Ternary Operator (? :)
▹instanceof Operator
▹Operator Precedence & Associativity

4

Control Flow Statements

2 weeks

▹If, If-Else, If-Else-If Statements
▹Nested If-Else
▹Switch Case Statements
▹For Loop
▹While Loop
▹Do-While Loop
▹Nested Loops
▹Break, Continue, Return Keywords
▹Enhanced For Loop (for-each)
▹Mini-Project: Simple Calculator or Number Guessing Game

5

Methods & Functions

2 weeks

▹What are Methods?
▹Defining and Calling Methods
▹Method Parameters & Return Types
▹Method Overloading
▹Static vs Instance Methods
▹The `static` keyword
▹Varargs (variable arguments)
▹Scope of Variables (Local, Instance, Class)
▹Introduction to Recursion

6

Arrays & Basic Data Structures

2-3 weeks

▹Single-Dimensional Arrays (Declaration, Instantiation, Initialization)
▹Accessing and Iterating through Arrays
▹Multi-Dimensional Arrays
▹Passing Arrays to Methods
▹`String[] args` in the main method
▹Common Array Problems (searching, sorting, reversing)
▹Introduction to ArrayList
▹Mini-Project: Student Marks Management System

GeekDost - Roadmaps & Snippets for Developers