By Durga Sir: Core Java Complete Notes

These notes provide a comprehensive overview of Core Java concepts. You can use these notes as a study material to learn Core Java.

static : Allows the JVM to invoke the method without instantiating the containing class. void : Returns no value back to the execution environment.

The Ultimate Guide to Core Java: Comprehensive Learning Roadmap Inspired by Durga Sir core java complete notes by durga sir

Emphasize immutability, thread safety, and memory allocations inside the String Constant Pool (SCP).

[ CORE JAVA SYLLABUS ] │ ┌──────────────────────────────────┼──────────────────────────────────┐ ▼ ▼ ▼ ┌──────────────────┐ ┌──────────────────┐ ┌──────────────────┐ │ Language Fund. │ │ OOP Principles │ │ Advanced Core │ ├──────────────────┤ ├──────────────────┤ ├──────────────────┤ │ • Data Types │ │ • Inheritance │ │ • Multithreading │ │ • JVM Memory │ │ • Polymorphism │ │ • Collections │ │ • Main Methods │ │ • Abstraction │ │ • Exception Hand.│ └──────────────────┘ └──────────────────┘ └──────────────────┘ Module 1: Language Fundamentals & JVM Architecture These notes provide a comprehensive overview of Core

Instead of just teaching how to write a loop, the notes detail exactly how the allocates memory, handles stack frames, and executes byte code. This deep architectural focus helps students write highly optimized, bug-free applications. 2. Interview-Centric Layout

The notes also cover crucial advanced topics to provide a comprehensive understanding of Java: void : Returns no value back to the execution environment

This section covers if-else statements, switch-case blocks, and loops. A highlight of his teaching is the detailed explanation of the "labeled break and continue" statements, which are often skipped in standard textbooks. Object-Oriented Programming (OOPS)

The famous contract: If you override equals() , you override hashCode() .

Understanding object-level and class-level locks to prevent data inconsistency. 6. Java Collection Framework

class MyRunnable implements Runnable public void run() System.out.println("Runnable running..."); // Execution: Thread t = new Thread(new MyRunnable()); t.start(); Use code with caution. Thread Lifecycle States A thread transitions through several states: →right arrow Runnable →right arrow Running →right arrow Blocked/Waiting →right arrow Terminated (Dead) . Synchronization