Core Java Complete Notes By Durga Sir Top -

This section is widely considered the best part of his notes. Classes and Objects. Inheritance, Polymorphism, Abstraction, and Encapsulation. Constructors, this and super keywords. 4. Packages and Access Modifiers Importing packages and creating user-defined packages. Public, Private, Protected, and Default modifiers. 5. Exception Handling Hierarchy of Exceptions. try-catch-finally blocks. Throw vs. Throws. Custom Exception Handling. 6. Multithreading Thread Lifecycle. Creating threads ( Thread class vs. Runnable interface). Synchronization and Inter-thread Communication. 7. Java Collection Framework (Very Important) List, Set, Map interfaces.

He explains complex concepts like Object-Oriented Programming (OOP) and Multithreading in a way that is easy to understand. core java complete notes by durga sir top

Thread is ready for execution, waiting for the Thread Scheduler. This section is widely considered the best part of his notes

PriorityQueue , Deque , and ArrayDeque . Map Interface (Key-Value Pairs, Keys are unique): HashMap : Non-synchronized, allows one null key. LinkedHashMap : Preserves insertion order of keys. TreeMap : Keys are sorted. Hashtable : Legacy, synchronized, no nulls allowed. 7. Java Input/Output (I/O) & Serialization How Java interacts with external files and networks. Constructors, this and super keywords

ArrayList : Backed by a resizable array. Best for search operations due to random access index retrieval.