Core Java

Learn Java syntax, variables, operators, type casting, and problem-solving through small coding challenges.

Mini Project: Create a basic Calculator that supports arithmetic and scientific operations.

• Variables, data types, operators
• Taking input & producing output
• Flowchart-to-code practice
• Writing testable functions

Master if-else, switch, and looping constructs with industry-style problems.

Mini Project: ATM Menu Simulation (Deposit, Withdraw, Balance Inquiry using switch-case).

Branching & looping logic

Nested structures for complex decisions

Dry-run & debugging logic

Dive into modular programming with methods and efficient data handling with arrays.

Mini Project: Student Marks Analyzer → store marks in arrays, compute average, highest, lowest, and rank.

Reusable method design

Array operations (search, sort, matrix problems)

Time complexity basics

Core OOP foundations aligned with industry coding practices.

Mini Project: Employee Payroll System (Part 1) → add employees, calculate salary.

• Writing classes & objects
• Encapsulation with getters/setters
• Constructors, static keyword
• UML basics for class design

Learn how real-world entities are modeled in Java with reusability and flexibility.

Mini Project: Extend Employee Payroll System → Permanent, Contract, Intern employees with different salary structures.

• Inheritance hierarchies
• Overriding vs overloading
• Polymorphism in design patterns

Advanced OOP with abstraction and interfaces, introducing SOLID principles (industry must-have).

Mini Project: Payment Gateway Integration → implement different payment types (UPI, Card, Wallet) using abstraction.

Abstract classes vs Interfaces

Multiple inheritance with interfaces

Dependency inversion & loose coupling

Robust coding with proper error handling, debugging, and logging.

Mini Project: File Reader Tool → read a file, handle invalid paths, and log errors.

• Checked vs unchecked exceptions
• Custom exceptions
• Using logging framework (Log4j/Java util logging)

Deep dive into Strings (a hot interview topic) and wrapper classes.

Mini Project: User Registration Validator → check username rules, password strength, and email format.

• String vs StringBuilder vs StringBuffer
• Autoboxing/unboxing
• Understanding heap vs stack memory

One of the most important interview & project modules – mastering Collections.

Mini Project: Library Management System → track books (HashMap), borrowers (ArrayList), availability (Set).

List, Set, Map, Queue with use cases

Iterators & enhanced for loop

Generics for type safety

Big-O complexity for collections

Read/write files and persist Java objects.

Mini Project: Extend Library System to store/load data from files.

FileReader/FileWriter, BufferedReader

Serialization & Deserialization

try-with-resources (Java 7+)

Highly valued in interviews & real-world systems (banking, gaming, web servers).

Mini Project: Ticket Booking System → multiple users booking tickets concurrently (handling synchronization).

• Creating threads (Runnable, Thread class)
• Synchronization & locks
• Executor framework basics
• Deadlock & race conditions

Modern Java features used in corporate projects.

Mini Project: Employee Analytics Dashboard → use Streams to compute average salary, department-wise grouping, and top performers.

• Lambda expressions
• Functional interfaces
• Streams API (map, filter, reduce)
• Optional class to handle nulls

Develop a real-world project applying all learned skills.

Examples:

• Banking Management System
• E-commerce Cart & Payment Flow
• Online Quiz/Test System

• End-to-end project design
• Applying OOP + Collections + Java 8 features
• Debugging & error handling
• Writing code ready for interview demos