Core Java Complete Notes By Durga Sir May 2026

| Parameter | Durga Sir Notes | Oracle Java Tutorials | Effective Java (Bloch) | | :--- | :--- | :--- | :--- | | Depth | Very High (Exam level) | Medium | Expert level | | Readability | Moderate (Instructor script style) | High | High | | Cost | Free/Paid (Batch dependent) | Free | Paid (Book) | | Best for | Certification & Interviews | API reference | Best practices |

Durga Sir’s notes on Collections are exhaustive, comparing performance and use-cases. core java complete notes by durga sir

While most courses teach OOPs superficially, these notes dissect every keyword. | Parameter | Durga Sir Notes | Oracle

He provides a classic example of two threads holding resources and waiting for each other's locks. Prevention: Avoid nested locks. Prevention: Avoid nested locks

Read the notes chapter by chapter. Highlight compiler errors. Durga Sir often provides 15–20 scenarios per concept (e.g., "What happens if you put a return statement in a finally block?").

Binding data and methods into a single unit. He emphasizes Data Hiding (making variables private) and providing getters/setters.