By Durga Sir - Core Java Complete Notes

Core Java — Complete Notes by Durga Sir Overview

Authoritative scope: Comprehensive Core Java notes covering fundamentals through advanced core APIs, modeled after Durga Sir’s teaching style: clear, example-driven, exam- and interview-focused. Audience: Beginners to intermediate Java developers preparing for college exams, placements, or production work. Format: Concise concept summaries, important code snippets, common pitfalls, sample questions, and quick-reference tables.

Contents (structured roadmap)

Java Basics and Environment

OOP Concepts and Design

Core Language Features

Exception Handling & Assertions

Collections Framework

Multithreading & Concurrency

I/O and NIO

Java 8+ Features (Lambda, Streams, Date/Time)

JDBC and Basic Networking